Answer
Endothermic reaction
Explanation
If the energy of the reaction is part of the reactants, it means the energy is absorbed from the reaction. When the energy is absorbed, the reaction is endothermic.
The first energy shell around a nucleus can hold _______ electrons. The second energy shell can hold ________.A. 0, 10B. 8, 18C. 10, unlimitedD. 2, 8
Explanation
The first shell (closest to the nucleus) can hold two electrons. The second shell can hold 8 electrons.
Answer
D. 2, 8
Suppose 24.9 g of nickel (II) bromide is dissolved in 300. mL of a 0.60 M aqueous solution of potassium carbonate.Calculate the final molarity of nickel(II) cation in the solution. You can assume the volume of the solution doesn't changewhen the nickel(II) bromide is dissolved in it.Round your answer to 3 significant digits.M0X3?EDoloArBHhx:CA
Answer
Explanation
Given that:
Mass of nickel (II) bromide (NiBr₂) that dissolved = 24.9 g
The volume of the aqueous solution of potassium carbonate (K₂CO₃) = 300 mL = 0.300 L
The molarity of K₂CO₃ = 0.60 M
What to find:
The final molarity of nickel(II) cation in the solution.
Step-by-step solution:
The first step is to write the balanced chemical equation for the reaction.
NiBr₂ + K₂CO₃ → NiCO₃ + 2KBr
The next step is to calculate the moles of NiBr₂ using:
[tex]\begin{gathered} Moles\text{ }(n)=\frac{mass\text{ }(m)}{M\text{ }(Molar\text{ }mass)} \\ \\ Molar\text{ }mass\text{ }of\text{ }NiBr₂=218.53\text{ }g\text{ /}mol \\ \\ Moles\text{ }of\text{ }NiBr₂=\frac{24.9g}{218.53g\text{/}mol}=0.1139\text{ }mol \end{gathered}[/tex]Also, the moles of K₂CO₃ can be calculated using:
[tex]\begin{gathered} Moles=Molarity\times Volume\text{ }in\text{ }L \\ \\ Moles\text{ }of\text{ }K₂CO₃=0.60M\times0.300L=0.1800\text{ }mol \end{gathered}[/tex]Using the mole ratio of NiBr₂ to K₂CO₃ from the equation above, that is (1:1)
we can say that K₂CO₃ is in excess.
So 0.1139 mol NiBr₂ gets converted into NiCO₃.
Hence, the final molarity of nickel(II) cation in the solution can be calculated using:
[tex]Molarity=\frac{Moles\text{ }of\text{ }Ni\text{ }in\text{ }solution}{Volume\text{ }of\text{ }solution}=\frac{0.1139mol}{0.300L}=0.380\text{ }M[/tex]Hence, the of nickel(II) cation in the solution is 0.380
What wavelength (in nm) of photon absorbed when an electron transitions from then = 2 to the n = 21 state?Using-2.998 for light
ANSWER
The wavelength of the photon is 367.87 nm
EXPLANATION
Given information
[tex]Speed\text{ of light = 2.998 }\times\text{ 10}^8\text{ m/s}[/tex]To find the wavelength of the photon absorbed, we will need to find the change in energy in transition using the below formula
[tex]E_n\text{ = -2.18 }\times\text{ 10}^{-18}\text{ }(\frac{1}{n^2})[/tex]From the question, the energy states given are from n = 21 to n =2
So, we can calculate the value of energy below
[tex]E_{21}\text{ - E}_2\text{ = }\Delta E[/tex][tex]\begin{gathered} \Delta E\text{ = -2.18 }\times\text{ 10}^{-18}\text{ }(\frac{1}{21^2}-\frac{1}{2^2}) \\ \Delta E\text{ = -2.18 }\times10^{-18}(\frac{1}{441}-\frac{1}{4}) \\ \Delta E\text{ = -2.18}\times10^{-18}(0.0022675737\text{ - 0.25}) \\ \Delta E\text{ = -2.18}\times10^{-18}\text{ }(-0.2477324263) \\ \Delta E\text{ = -2.18}\times10^{-18}\times(-2.477324263\times10^{-1}) \\ \Delta E\text{ = 2.18}\times2.477324263\times10^{-18-1} \\ \Delta E\text{ = 5.400}\times10^{-19}J \end{gathered}[/tex]Since we have gotten the value of the energy, hence, we can now calculate the wavelength of the photon using the below formula
[tex]\begin{gathered} \Delta E=\frac{hc}{\lambda} \\ Where \\ h\text{ = Planck's constant} \\ c\text{ = speed of light} \\ \lambda\text{ = wavelength} \end{gathered}[/tex]Recall,
h = 6.626 x 10^-34 J.s
c = 2.998 x 10^8 m/s
[tex]\begin{gathered} \lambda=\frac{hc}{\Delta E} \\ \frac{}{} \\ \lambda=\frac{6.626\times10^{-34}\times2.998\times10^8}{5.40\times10^{-19}} \\ \lambda=\frac{6.626\times2.998\times10^{-34+8}}{5.40\times10^{-19}} \\ \\ \lambda=\frac{19.865\times10^{-26+19}}{5.400} \\ \lambda=\frac{19.865}{5.40}\times10^{-26+19} \\ \lambda=3.6787\text{ }\times10^{-7} \\ \lambda=\text{ 367.87nm} \end{gathered}[/tex]Hence, the wavelength of the photon is 367.87 nm
Draw a picture of the molecules/ compounds/ atoms in this reaction. Draw both reactants and products.for silver oxide
The diagram for the reactant molecular oxygen (O₂) is
The diagram for the reactant silver (Ag) is
The diagram for the product silver oxide is
How many grams of solute are needed to produce 1.00 Lof a 3.50 M solution of H2SO4
In order to solve this question, we will use the Molarity formula, which is:
M = n/V
Where:
M = molarity
n = number of moles
V = volume in liters
We don't have the number of moles, but we have the formula for molarity to help us find it, now we add the values into the formula:
3.50 = n/1.00
n = 3.50 moles of H2SO4
Now we have the number of moles, and the molar mass for H2SO4 is 98.079g/mol, now we can find the mass in grams:
98.079g = 1 mol
x grams = 3.50 moles
x = 343.3 grams of H2SO4
4 Ga +302 ---> 2 Ga203Based on the balanced equation above, what is the limiting reactant when you have 8.7 moles ofgallium and 6.8 moles of oxygen?
Based in the following equation:
[tex]4Ga+3O_2\to2Ga_2O_3[/tex]We're asked to identify the limiting reactant when there's 8.7 moles of gallium and 6.8 moles of oxygen reactioning.
To identify the limiting reactant, we could follow the steps:
1. Using the coefficients of the reaction, we are going to find how many moles of the other compound that reacts would be needed according to the amounts that we have:
[tex]\begin{gathered} 8.7molesGa\cdot\frac{3molesO_2}{4molesGa_{}}=6.525molesO_2 \\ \\ 6.8molesO_2\cdot\frac{4molesGa}{3molesO_2}=9.0667molesGa \end{gathered}[/tex]2. Analyze:
According to the reaction, we need 6.525 moles of Oxygen and 9.0667 moles of Gallium.
And, if you look, we have 8.7 moles of Gallium and 6.8 moles of oxygen.
As you can notice, we need 9.0667 moles of gallium and we just have 8.7 moles, so there's amount of gallium missing according to the reaction. Thus, the limiting reactant is gallium.
Other fact that we could note is that there's more amount of Oxygen that we have compared with the amount that we need so that's an excess. That tells us that the excess reactant is the Oxygen.
Another way to identify the limiting reactant is just to divide each amount that we have by each coefficient, and the least result will be the limiting reactant:
[tex]\begin{gathered} \frac{8.7\text{molesGa}}{4}=2.175 \\ \\ \frac{6.8\text{molesO}2}{3}=2.2666 \end{gathered}[/tex]As you can see, the least result comes from Gallium. So we confirm that Gallium is the limiting reactant.
State and show an example of a heterogenous mixture {solid or liquid }found in your pantry /refrigerator.Fully describe why it is an heterogeneous mixture?
STEP-BY-STEP EXPLANATION:
Firstly, we need to know what a mixture is
We will go ahead by defining a mixture
A mixture is defined as the combination of two or more constituents that are physically combined together.
We need to also know that the mixture is divided into two which are:
Homogenous mixture and Heterogenous mixture
The next thing is to define a homogenous and heterogeneous mixture
A homogenous mixture is a type of mixture in which the composition of the constituent element is uniform or constant throughout the mixture. Examples of homogenous mixtures are;
Blood
Seawater
Brass
Steel
Air
Natural gas
Heterogenous mixture: This is a type of mixture in which the composition of the constituent elements is not uniform throughout the mixture. Examples of heterogenous mixtures are given below.
Concrete
Sand and sugar
Ice cubes in cola
Salt and pepper
From the examples of heterogenous mixture listed above, you can see that the composition of the two constituents is not uniform. You can easily identify sugar when mixed with sand and vice versa
Pantry contains liquid and solid substances such as cereals, milk, carbonated drinks, etc.
The cereal is in a solid state. Cereals are grains used for food, such as maize, wheat, etc
You will see that when those grains are mixed together, we can easily separate them and this is because the composition of the grains is not uniformly mixed together throughout the mixture. The same thing is applicable to the liquid substance. Also, when you mix your milk with cereals, you will observe that the cereals will not dissolve in the milk and this is because the two substances are not mixed uniformly. Hence, it is a heterogeneous mixture.
eed to also know that mixture
Match each phase change with its description.FreezingSublimationCondensationVaporization?A change from liquid to solid?A change from solid to gas?A change from gas to liquid
Explanation:
Please, look at the following drawing:
According to this graph, the answers will be:
Freezing = a change from liquid to solid
Sublimation = a change from solid to gas
Condensation = a change from gas to liquid
Vaporization = a change from liquid to gas
What is the purpose of the salt bridge in an electrochemical cell?Is the physical barrier between the anode and the cathodeBalances the pH of the two solutionsallows ions to move between the two half-cellsActs as the pathway for electrons to travel from one electrode to the other
In this question, we need to define what is the purpose of a salt bridge in an electrochemical cell. The definition of the salt bridge is a way to connect both sides of the redox reaction, so the salt bridge will connect the half cells of the electrochemical cell. Therefore, based on this information, the best answer to define the purpose of a salt bridge will be to allow ions to move between the two half-cells, letter C
If there is a mixture of hydrogen and oxygen gas in a container with 10 moles total and the mole fraction of hydrogen is .67, how many moles of each gas are there?
ANSWER
The number of moles of hydrogen is 6.7 moles
The number of moles of oxygen is 3.3 moes
EXPLANATION
Given that;
The total number of moles of gases is 10
The mole fraction of hydrogen is 0.67
Follow the steps below to find the number of moles of each gas
Recall, that the total mole fractions all of the gases in container must be 1
Mathematically
Mole fraction of hydrogen + mole fraction of oxygen = 1
The next step is to find the mole fraction of oxygen
[tex]\begin{gathered} \text{ Mole fraction of hydrogen + mole fraction of oxygen = 1} \\ \text{ 0.67 + mole fraction of oxygen = 1} \\ \text{ Subtract 0.67 from both sides of the equation} \\ \text{ 0.67 - 0.67 + mole fraction of oxygen = 1} \\ \text{ mole fraction of oxygen = 1 - 0.67} \\ \text{ Mole fraction of oxygen = 0.33} \end{gathered}[/tex]The mole fraction of oxygen is 0.33
The next step os to find the number of moles of each gas in the container using the below formula
[tex]\text{ mole fraction = }\frac{\text{ number of moles of gas}}{\text{ total number of moles of the gases}}[/tex]For hydrogen gas
[tex]\begin{gathered} \text{ 0.67 = }\frac{\text{ number of moles of hydrogen}}{\text{ 10}} \\ \text{ cross multiply} \\ \text{ number of moles of hydrogen gas = 0.67 }\times\text{ 10} \\ \text{ number of moles of hydrogen gas = 6.7 moles} \end{gathered}[/tex]Therefore, the number of moles of hydroges gas in the mixture is 6.7 moles
For oxygen
[tex]\begin{gathered} \text{ 0.33 = }\frac{\text{ number of moles of oxygen}}{\text{ 10}} \\ \text{ cross multiply} \\ \text{ number of moles of oxygen = 0.33 }\times\text{ 10} \\ \text{ number of moles of oxygen = 3.3 moles} \end{gathered}[/tex]The number of moles of oxygen is the mixture is 3.3 moles
Describe in detail the characteristics of an acid and a base. Then, relate these terms to a description of the pH scale and to an explanation of how buffers work in living organisms. Why are buffers so important in organisms?
• acids ,are sour/tart, feel like water, may sting when touched, react strongly with metals, conduct electricity since they ionize in solutions, and turn blue litmus paper red.
,• Bases, are bitter, slippery and smooth, do not react with metals usually, conduct electricity, and turn red litmus paper blue.
2. How do Acids and base relate to pH scale .
Acids →When H+ ions dissociates in a solution, acids area created
→pHs of less than 7 indicate acidity,
Base →Bases are created from the dissociation of OH− in solution.
→ pH of greater than 7 indicates a base
3. How buffers work in living organisms and their importance.
• Buffer is a chemical substance that maintains the pH of living organisms.
,• This means that they are able to resist certain changes in the body's pH level ( ,for example...if there is a sudden addition of acid/base in the body, they are able tomaintain stable internal invironment)
,• Therefore, buffers are necessary for survival of living cells.
Given this equation: 3 MgCl2 + 2 Al → 3 Mg + 2 AlCl3, if 2.1 moles of magnesium chloride reacted how many moles of aluminum chloride are produced?
Let's see that 3 moles of magnesium chloride (MgCl2) produce 2 moles of aluminum chloride (AlCl3), we can do a rule of three to find the number of moles required of AlCl3 by 2.1 moles of MgCl2, like this:
[tex]\begin{gathered} \text{3 moles MgCl}_2\to2molesAlCl_3 \\ 2.1molesMgCl_2\to?molesAlCl_3 \end{gathered}[/tex]The calculation would be:
[tex]2.1molesMgCl_2\cdot\frac{2molesAlCl_3}{3molesMgCl_2}=1.4molesAlCl_3.[/tex]So, the answer is that 1.4 moles of aluminum chloride are produced by 2.1 moles of magnesium chloride.
the number of moles of solute in a bottle containing 225 mL of 0.220 mol/l sodium sulfide solution is?
In order to find the answer for this question we will use the Molarity formula, which is:
M = n/v
where
M = molar concentration or molarity in mol/L
n = number of mols
v = volume in Liters
Now using the values given in the question we will have:
0.220 = n/0.225
n = 0.0495 moles of solute
Find the mass in kg of 5.00 gal of water when the water density is 0.997 g/mL . Given: l gal = 4 qt, 1L = 1.057 qt. Give answer in kg
The mass of water is 18.87kg.
1st) It is necessary to convert the 5.00 gal into mL, knowing that 1 gal is equal to 1 qt, and 1 L is equal to 1.057 qt. Then we convert the L into mL:
[tex]5.00\text{gal}\cdot\frac{4qt}{1\text{gal}}\cdot\frac{1L}{1.057qt}\cdot\frac{1000mL}{1L}=18,921.5mL[/tex]2nd) Now, with the formula of density, we can calculate the mass of water replacing the values:
[tex]\begin{gathered} \text{density}=\frac{mass}{volume} \\ 0.997g\cdot mL^{-1}=\frac{mass}{18,921.5mL} \\ \text{mass}=0.997g\cdot mL^{-1}\cdot18,921.5mL \\ \text{mass}=18,864.7g \end{gathered}[/tex]3rd) Finally, it is necessary to convert the grams into kg:
[tex]18,864.7g\cdot\frac{1\operatorname{kg}}{1000g}=18.87\operatorname{kg}[/tex]So, the mass of water is 18.87kg.
How many significant figures are contained in each of the follow measurements?
Significant Figures:
a) 0.3925g - 4 sig. fig.
b) 3x10^16 m- 1 sig. fig.
c) 33530001 kg- 8 sig. fig.
d) 9.655x10^-3 J- 4 sig. fig.
e) 0.0605 cm^3- 3 sig. fig.6
f) 67.00 kg -4 sig. fig.
g) 0.05030 g/mL- 4 sig. fig.
What is the name of Al3+ ?AluminumAluminide ionAluminum ionAluminous ion
An atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons.
In this case, we can see that Aluminum's atom is losing three electrons as it has a +3 charge, so:
The name of Al3+ is aluminum ion.
The amount of a solute that dissolves in a solvent is determined by all of the following except
The correct is:
A change in pressure does not usually change the solubility of solid or
liquid solutes. However, the solubility of any gas increases at higher
pressures and decreases at lower pressures.
We assume we talk about solid or liquid solutes.
Answer: b. Pressure
what is the relationship between the proton number and atomic number of an atom?
1) Proton. A proton is a positive particle found in the nucleus. The number of these particles defined the properties of an element.
We refer to the proton number as the atomic number. So, the proton number and the atomic number are the same.
The number of significant figures in the conversion factor 1000 mL = 1 L is:00010 4Infinite
The question requires us to identify the amount of significant figures in the conversion 1000 mL = 1 L
To answer this question, we must keep in mind that trailing zeros are a sequence of 0 digits in a number after which no other digits follow. Considering that definition, we can say that the zeros in the number 1000 are trailing zeros.
Now, taking into consideration that trailing zeros will only be significant if the number has a decimal point, the number of significant figures in 1000 is 1 rather than 4.
Therefore, as the number 1 also presents only one significant zero, the best option to answer this question is 01.
Ethanol, C₂H₂OH, and carbon dioxide, CO₂, haveapproximately the same molecular weight, yet carbon di-oxide is a gas at STP and ethanol is a liquid. How do youaccount for this difference in physical property?
Answer: Ethanol contains the elements oygen and hydrogen so they can participate in hydrgen bonding with each other. This force of attraction between the molecules in ethanol are greater when compared to carbon dioxide that only has covalent bonding. It would require more energy to break these bonds. Therefore, the hydrogen bonding in addition to the polar covalent in ethanol makes the molecule a liquid at room temperature and covalent bonding in carbon dioxide makes it a gas at room temperature.
3. Combining 167.7 g of Fe with excess water produces 6.00 g of hydrogen gas. What is
the percent yield?
The balanced chemical equation is
[tex]3Fe(s)+4H_2O(l)\to Fe_3O_4(s)+4H_2(g)[/tex]We know that the reaction produces 6 grams of hydrogen gas, this is the actual yield. We need to find the theoretical yield using the stoichiometry of the chemical equation.
According to the equation, 3 moles of Fe produces 4 moles of hydrogen gas, this is the ratio, we know that the molar mass of Fe is 55.845 gr/mol.
[tex]167.7g(Fe)\cdot\frac{1\text{mol(Fe)}}{55.845g(Fe)}\cdot\frac{4moles(H_2)}{3\text{moles(Fe)}}\cdot\frac{2.02g(H_2)}{1\text{mole(H}_2)}=8.09g(H_2)[/tex]The theoretical yield is 8.09 grams of hydrogen gas. Now we can find the percent yield.
[tex]Yield=\frac{Actual}{Theoretical}=\frac{6g}{8.09g}=0.7417\to74.17[/tex]Therefore, the percent yield is 74.17%.
What is it called when a solid changes directly into a gas? From a solid into a liquid?
ANSWER
The process of a solid changing to a gas is called SUBLIMATION
The process of solid turning to liquid is called MELTING
EXPLANATION:
Sublimation is the transition of a substance directly from the solid phase to the gas phase without passing through the liquid phase.
This occurs when the particle of the solid acquires enough energy to completely overcome the force of attraction holding the solid particles together.
Example: dry ice in water changing directly to carbon dioxide gas
Therefore, the process of a solid changing to a gas is called SUBLIMATION
The process of solid turning to liquid is called MELTING
What is the molarity of a solution that has 78 grams of H2SO4, (98.0 g/mol) dissolved in 1.75 liters ofsolution?
Answer
Molarity (C) = 0.455 mol/L
Explanation
Given:
Mass of H2SO4 = 78 g
Molar mass of H2SO4 = 98.0 g/mol
Volume of the solution = 1.75 L
Required: The molarity of the solution
Solution
Step 1: Calculate the number of moles of moles of H2SO4
n = m/M where n is the moles, m is the mass and M is the molar mass
n = 78 g/98.0 g/mol
n = 0.796 mol
Step 2: Calculate the molarity of the solution
C = n/V where C is the molarity/concentration, and V is the volume of the solution
C = 0.796 mol/1.75 L
C = 0.455 mol/L
What is the molarity of a solution that contains 8.4 g NaOH in 240.0 mL of solution?
Answer:
[tex]0.875\text{ M}[/tex]Explanation;
Here, we want to calculate the molarity of the solution
To calculate the molarity, we use the following formula:
[tex]molarity\text{ = }\frac{number\text{ of moles}}{volume}[/tex]To calculate the number of moles, we have to divide the mass by the molar mass
The molar mass of sodium hydroxide is 40 g/mol
Thus, we have the number of moles as:
[tex]\frac{8.4}{40}\text{ = 0.21 mole}[/tex]The volume to use would be in L
To get this, we divide the given volume by 1000
Thus, we have the volume in liters as:
[tex]\frac{240}{1000}\text{ = 0.24 L}[/tex]Finally, we have the molarity as:
[tex]\frac{0.21}{0.24}\text{ = 0.875 mol/dm}^3[/tex]A solution of an unknown compound has a concentration of 27.3 % by mass. Howmany moles are present in 0.965 kg of solution if the solute has a molar mass of 25.2g/mol?
1) Mass percent
[tex]\%=\frac{gramsofsolute_{}}{gramsofsolution}\cdot100[/tex]2) List known values
Sample: 0.965 kg
[tex]g=0.965kg\cdot\frac{1000g}{1kg}=965g[/tex]2) Plug in known values and solve for grams of solute.
[tex]27.3\%=\frac{\text{grams of solute}}{965\text{ g solution}}\cdot100[/tex][tex]gSolute_{}=27.3\cdot\frac{965\text{ g solution}}{100}_{}=263.445\text{ g solution}[/tex]3) Convert grams of solute to moles
The molar mass of the unknown compound is 25.2 g/mol
[tex]mol_{}=263.445g\cdot\frac{1mol_{}}{25.2g_{}}=10.45mol_{}[/tex]There are 10.45 moles of the unknown compound present in the sample.
SUPPOSE A PIECE OF SILVER JEWELRY CONTAINS 7.15x10^22 ATOMS OF SILVER (Ag). How many dozens of silver atoms are in the piece of jewelry?
We have 7.15x10^22 atoms of Ag
We must know that a dozen of atoms is equal to 12 atoms.
Procedure:
7.15x10^22 atoms/(12 atoms/dozen) = 5.96x10^21 dozens approximately
Answer: 5.96x10^21 dozens
What is the variable for this number 250 KTPnV
Answer: The best option to answer this question is the first one, "T"
Explanation:
The question requires us to choose, among the options given, the appropriate variable for the value "250 K".
Considering that 250 K corresponds to the value 250 Kelvin degrees, and assuming that the letters given in the options correspond to Temperature (for T), Pressure (for P), number of moles (for n), and Volume (for V), we can say that the variable temperature (T) is the most appropriate for the value given, as Kelvin degrees (or simply K) corresponds to a unit to measure temperature.
Therefore, the best option to answer this question is the first one, "T".
In most cases, as the temperature increases, the solubility of a solid in a liquid solvent:Group of answer choicesIncreasesDecreasesStays the sameDoubles
ANSWER
Increases
EXPLANATION
Solubility is defined as the ability of a solute to dissolve in a solvent.
One of the factors that affect solubility is temperature.
As the temperature increases, the solubility also increases because there is an increase in kinetic energy as this allows the molecules of the solvent to move freely.
Hence, an increase in temperature will result in an increase in solubility.
When sodium thiosulfate pentahydrate dissolves in water in a beaker, the beaker becomes cold. Why?A.) This solute was cold when it was placed into the water.B.) Dissolving this solute is an exothermic process.C.) Dissolving this solute reaches a cold equilibrium point.D.) Dissolving this solute is an endothermic process.
When we make a mixture, the molecules and bonds present in each of the substances can exert attraction or repulsion and can absorb or release energy. This energy is evidenced by an increase or decrease in temperature.
When the mixture releases energy, the temperature will increase and is called exothermic. When the mixture absorbs energy, the temperature will decrease and is called endothermic.
Therefore, if the beaker becomes cold it means that the mixture of these two compounds is endothermic.
Answer: D.) Dissolving this solute is an endothermic process.
how to get pure alumina? explain with the reactions
Okay I will explain you friend...
To get pure alumina, you should follow these below steps.
Step (1):- Impurity alumina is treated with conc. NaOH solution to form sodium aluminate.
[tex]{ \green{ \tt{Al2O3 + 2NaOH + 3H2O → 2Na[Al(OH)4]}}}[/tex]
Step (2):- sodium aluminate is treated with carbon dioxide gas to form precipitated Al2O3
[tex]{ \purple{ \tt{2Na[Al(OH)4] + CO2 → Al2O3.xH2O + NaHCO3}}}[/tex]
Step (3):- Precipitated Al2O3 separated by filtration and heated at 1470K to give pure alumina.
[tex]{ \blue{ \tt{Al2O3.xH2O \: \: —(1470K)→ Al2O3 + xH2O}}}[/tex]