Answers
Based on the fgiven K_{a} values of the acids, the equilibrim concentrations of[tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex] is dtermined using ICE tables.
What are acid dissociatio constants [tex]K_{a}[/tex]?An acid dissociation constant, [tex]K_{a}[/tex] of an acid is a measure of the strength of the acid in solution. The larger the [tex]K_{a}[/tex] value of an acid, the stronger the acid, therefore, acid dissociation constants are usually apply to only weak acids because strong acids have exceedingly large [tex]K_{a}[/tex] values.
It is written as a qoutient of the equilibrium concentrations of the aqueous species in the acid solution.
[tex]K_{a} = \frac{[H^{+}] [A^-{}]}{HA}[/tex]For the weak acids such as [tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex], their equilibrim concentrations are determined using their [tex]K_{a}[/tex] values and an ICE table.
The pH of solutions are estimated using indicators such as methyl orange, methyl red and phenolphthalein. The colors of indicators change according to the pH of the solution
Acidic solutions have pH less than 7 while alkaline solutions have pH greater than 7.
Therefore, acids have low pH and weak acids have low [tex]K_{a}[/tex] values.
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Related Questions
what is an important role that fish have in our universe?
Answers
Answer:
Answer:Fish play an important role in nutrient cycles because they store a large proportion of ecosystem nutrients in their tissues, transport nutrients farther than other aquatic animals and excrete nutrients in dissolved forms that are readily available to primary producers.
3. Calculate the mass of NH3 that can be produced from the reaction of 125 g of NCI:
according to the following equation:
NCl3 + 3 H2O → NH3 + 3 HOCI
Answers
The mass of NH₃ : = 17.629 g
Further explanation
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Given
125 g NCl₃
Required
The mass of NH₃
Solution
mol NCl₃(molar mass : : 120.5 g/mol)
= 125 g : 120.5 g/mol
= 1.037
From the equation, mol ratio NCl₃ : NH₃ = 1 : 1, so mol NH₃ = 1.037
Mass NH₃(molar mass : 17 g/mol) :
= 1.037 x 17
= 17.629 g
Why do some animals migrate in and out of the coniferous forest? (select two) Food Cover Precipitation Temperature
Answers
Answer:Tep/Shel/
Explanation:
Answer:
it's food and procipitation
Explanation:
What happens when an electron jumps energy from energy level 3 energy level 6 in an atom
Answers
Explanation:
high energy to Low energy
=the electron gains energy (K.E)
What are some uses of radioactive dating?
HELPP PLEASEEEE!!!
Answers
Answer:
Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known.
The ________________and ______________ of magma cause igneous rocks to form.
A: melting and cooling
B: cementation and compaction
C: weathering and erosion
D: heat and pressure
Answers
Answer:
option B
cementation and compaction
6. Two flasks at the same temperature are joined by a glass tube with a stopcock. Flask A is a 4.0 L flask containing
N2(e) at 2.0 atm, while flask B is a 10.0 L flask containing CO(g) at 1.4 atm. What is the final pressure in the flasks
after the stopcock is opened?
Hints:
Determine the final volume for the gases leasy!).
.
Answers
The final pressure in the flasks (containing N₂ and CO) after the stopcock is opened is 1.57 atm
How to determine the mole in flask AVolume (V) = 4 L Pressure (P) = 2 atm Temperature (T) = STP = 273 KGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?n = PV / RT
n = (2 × 4) / (0.0821 × 273)
n = 0.357 mole
How to determine the mole in flask BVolume (V) = 10 L Pressure (P) = 1.4 atm Temperature (T) = STP = 273 KGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?n = PV / RT
n = (1.4 × 10) / (0.0821 × 273)
n = 0.625 mole
How to determine the final pressure Total volume (V) = 4 + 10 = 14 L Total mole (n) = 0.357 + 0.625 = 0.982 moleTemperature (T) = STP = 273 KGas constant (R) = 0.0821 atm.L/Kmol Pressure (P) =?P = nRT / V
P = (0.982 × 0.0821 × 273) / 14
P = 1.57 atm
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What properties of water are related to Oxidation?
Answers
Answer:
water has several important physical properties. Most of the physical properties of water are quite atypical e.g molar mass is 18.0151grams per mol and melting point is 0.00 degree
Help me please, Im giving brainliest answer.
Answers
Answer:
Sodium nitride is exothermic reaction and hydrochloric acid is endothermic reaction.
balancing equation plsss help
Answers
Answer:
The formula is : C3H8 + 5O2 → 3CO2 + 4H2O.
Explanation:
good luck
PLease help me find someone who knows the answer and thank you so much I might give you brainliest if it is correct
Answers
Answer: because the hot water molecules are moving faster
Explanation: hot water=faster molecules= it spreads faster
what is Newton's second law of motion
Answers
Answer:
Newton's second law of motion is F = ma, or force is equal to mass times acceleration.
Explanation:
Answer:
F= m x a
force = mass x acceleration
Explanation:
The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased.
the pH of an acidic solution is 2.47. what is the [H+]
Answers
[tex]pH=-\log[H^{+}]\\\\\implies [H^{+}] =10^{-pH}=10^{-2.47}=0.0034~M[/tex]
what makes the geometry of the tin(4) hydride to have a grater stability?
Answers
Explanation:
1. wet seving has been propsed as amethofolog to study aggregete stability aganist watet erosion
Mention the direct consequence of the following factors on the chemical behaviour of
transition elements:
1) Transition elements can lose as well as accept electrons and exhibit a variety of oxidation
states.
Answers
The transition metals can form a variety of complexes because can lose as well as accept electrons .
What are transition elements?The transition elements are those elements that are foud at the middle part of the periodic table having incompletely filled d orbitals.
These elements have a variable oxidation state. They can loose and accept electrons easily and this is why transition metal elements can form a variety of complexes with different colors and other properties.
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What is the correct formula that would
result from the combination of the two
ionic species?
K1+ and Cro 2-
Answers
Answer:
A
Explanation:
Is not my personal answer, but here is what I found.
"This entity has been manually annotated by the ChEBI Team. Potassium chromate is the inorganic compound with the formula (K2CrO4). This yellow solid is the potassium salt of the chromate anion"
The ________________and ______________ of magma cause igneous rocks to form.
Answers
Answer:
The solidifying/cooling and crystallizing of magma causes igneous rocks to form.
CH2CH3
CH3CH2-C-CH2CH3
CH3
what’s the IUPAC name?
Answers
CH2CH3 - methyl-pentane
CH3CH2-C-CH2CH3 - 2-methyl-4hexyne
CH3- methyl
an industry is found to be discharging 20ib per day of benzene into a river with a flow of 10billion gallon per day. what will be the resulting benzene concentration, if the benzene is uniformly mixed with river flow
Answers
Answer:
Explanation:
bullet A layer of benzene (n = 1.50)2.60cm deep floats on water (n = 1.33) that is 6.50 cm deep. What is the apparent distance from the upper benzene surface to the bottom of the water laver when it is viewed at normal incidence?
potassium hydroxide → potassium oxide + water
-
how do i balance this equation?
Answers
2KOH --> K²O + H²O
Explanation:
Potassium Hydroxide = KOH
Potassium oxide = K²O
Water = H²O
KOH --> K²O + H²O
K = 1. K = 2.
2KOH --> K²O + H²O
O = 2. O = 2.
H = 2. H = 2.
Balanced symbol = 2KOH --> K²O + H²O
Balanced word = 2Potassium Hydroxide --> Potassium oxide + Water.
Arrange the following acids from strongest to weakest:
HF, HBr, HCl, HI
Answers
Answer:
HI>HBr>HCL>HF
Explanation:
2 Which of these rates of travel is slowest
a.5 kilometres per second
b.20 kilometres per minute
c.60 kilometres per hour
Answers
Answer:
60 kilometres per hour is the slowest rate of travel
Explanation:
we convert
20 kilometer per minute into kilometer per second
it comes out 1/3 kilometer per sec
Answer:
c
Explanation:
a- 5/1km per second
b-1/3km per second
c. 1/60km per second
the larger the denominator the smaller the fraction
What are some other type of chemical reactions? What makes them different?
Answers
The difference between all of this is that they don’t have the same outcome, combustion combines, synthesis comes together, decomposition breaks down, single displacement trades place, double displacement switch place,
Which pictures show the car at zero acceleration? A. Picture 1 only. B. Pictures 1 and 3. C. Picture 2 and 4. D. Picture 4 only.
Answers
Picture 1 shows choice B
Explanation:
picture 1 shows the car to which the net force is a zero
Criteria and constraints help determine which solutions will be applied when extracting materials from pomace in which way
might a specific criterion be applied to this situation? (1 point)
The use of pomace for pharmaceuticals might be chosen if a food company does not have access to a
production plant for extracting chemicals
The use of pomace for pharmaceuticals might be chosen if minimizing production costs is desired
a
The use of pomace for animal feed might be chosen if a food company does not have access to a
production plant for extracting chemicals
The use of pomace for animal feed might be chosen if minimizing production costs is desired.
Answers
Answer:
The use of pomace for animal feed might be chosen if minimizing production costs is desired
Explanation:
i've taken the test
The use of pomace for animal feed might be chosen if minimizing production costs is desired. Therefore, the correct option is option D.
What is pomace?The solid byproduct of pressing grapes, olives, or even other fruits for juice or oil is known as pomace or marc. It includes the fruit's skins, pulp, seeds, or stems. Pomace brandy has traditionally been made from grape pomace. Currently, it is primarily used as fertilizer, animal feed, or to extract bioactive substances like polyphenols.
The Latin word "pomum" is where "pommace" comes from. The phrase "pomace" was first used by the English to describe the byproduct of making cider. Pomace wine, which had an alcohol concentration of three to four percent, was very common during the Middle Ages. The use of pomace for animal feed might be chosen if minimizing production costs is desired.
Therefore, the correct option is option D.
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When barium nitrate solution is added to aqueous sulfurous acid a white precipitate forms what is the name of that white precipitate
Answers
Answer:
I expect it is barium sulfate
Explanation:
How to do Lewis structure for Al?
Answers
Notes:-
Al has Z=15electron configuration:-
[Ne]3s²3p³Valency is 3
So 3 dots are included
Thermal energy transfer lab report.
I need answers for questions 1-11.
If you cannot answer every question, that is ok. I just need the help. Here are the questions.
1. What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
2. What is your hypothesis (or hypotheses) for this experiment?
3. What methods are you using to test this (or each) hypothesis?
4. Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?
5. Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
6. What do the key results indicate?
7. If you constructed graphs, what trends do they indicate in your data?
8. Were there any problems with the experiment or the methods? Did you have any surprising results?
9. What do the results tell you about your hypothesis(es)?
10. How do the data support your claim above?
11. If you could repeat the experiment and make it better, what would you do differently and why?
Answers
Thermal energy flows from hot to colder bodies and is determined by the process of calorimetry.
What is thermal energy?Thermal energy is the energy transfer process which occurs as a result temperature difference between two bodies.
Thermal energy flows from hot to colder bodies.
The quantity of Heat transfer is determined using a calorimeter.
The calorimeter works on the principle of conservation of energy. The principle of the calorimeter is stated as follows:
Heat lost = Heat gainedThe quantity of Heat, q = mass × specific heat capacity × temperature difference
Therefore, it can be concluded that thermal energy flows from hot to colder bodies.
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Answer:
I did this earlier, here's what I put.
How many carbon atoms are there in 5 molecules of C6H12O6?
Answers
Answer:
6
Explanation:
Glucose has a chemical formula of: C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.
Solid Snake is being chased up the communications tower. Solid Snake is 75 kg and is carrying 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, how much work was done against gravity?
a.
4.04 kJ
b.
109.15 kJ
c.
135.34 kJ
d.
5.01 kJ
Answers
Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).
What is work?In physics, work is the energy transferred to or from an object via the application of force along a displacement.
In this problem, the force that does the work is the one that opposes the weight.
Step 1: Calculate the total weight of the system.Solid Snake is 75 kg and is carrying 18 kg of equipment. The total mass is:
m = 75 kg + 18 kg = 93 kg
We can calculate the weight using Newton's second law of motion.
F = m . g = 93 kg . 9.8 m/s² = 911.4 N
Step 2: Calculate the total displacement.Solid Snake climbs 27 flights of stairs, each 5.5 m in height.
27 . 5.5 m = 148.5 m
Step 3: Calculate the work done.We will use the definition of work.
w = F . s = (911.4 N) . (148.5 m) . (1 kJ/1000 J) = 135.34 kJ
Solid Snake (75 kg) carries 18 kg of equipment. If Solid Snake climbs 27 flights of stairs, each 5.5 m in height, the work done against gravity is 135.34 kJ (c).
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