Meera added blue copper sulphate crystals to some water in a beaker.
The copper sulphate dissolved in the water.
1 give one way meera could see that the copper sulphate had dissolved in the

Answers

Answer 1

Answer:

The solid crystals disappeared

Explanation:

When a soluble solid solute is added to water, the solid solute disappears after a little while. The disappearance of this solute indicates that the solute has been dissolved in water.

In this case, blue copper sulphate crystals are added to water, the blue crystals disappear leaving only a blue solution. The disappearance of these blue copper sulphate crystals indicates that the substance has dissolved in water.


Related Questions

why do we need to rinse the mouth before collecting the saliva​

Answers

The rinsing of mouth is to remove food particles and minimize mucous

-
(11) Deduce the number of dyes in food colouring H.

(iii) Suggest why food colouring F does not move during the experiment.

(iv) Explain which two food colourings contain the dye that is likely to be the most soluble the solvent.

(b) Determine which food colouring contains a dye with R, value closest to 0.67
Show your working.

Answers

Answer:

(ii) 1 dye

(iii) Food coloring F is insoluble in the solvent

(iv) 'E' and 'H'

(b) Food colouring G

Explanation:

Paper chromatography principle is based on the rates of migration of chemicals across a sheet of paper which are different and it consists of a stationary phase such as the water in the paper and a mobile phase such as the solvent resulting in the partitioning of the components of the mixture across the paper

The solution components are positioned to start in one place from where they migrate and separate out on the chromatography paper

(ii) The number of components into which the food colouring 'H' separates into = 1

Therefore, the number of dyes in food colouring 'H' = 1 dye

(iii) Food coloring 'F' does not move because it is insoluble in the solvent, which is the mobile phase

(iv) The food colouring that contains the dye that is likely to be most soluble in the solvent are does for which the dyes travel furthest, which are;

Food coloring 'E' and 'H'

(b) Using a similar question solution found on 'tutor my self' website, we have;

The [tex]R_f[/tex] values are given as follows;

[tex]R_f = \dfrac{Distance \ moved \ by \ dye}{Distance \ moved \ by \ solvent}[/tex]

The distance moved by the solvent = 5 units

The distance moved by dyes in food colouring 'E' and 'H' = 4 units

The distance moved by dye in food colouring 'G' = 3.3 units

The distance moved by the second dye in food colouring 'E' = 2.7 units

By inspection, we get;

[tex]R_f[/tex] dye in food colouring 'G' = 3.3/5 = 0.66,

Therefore, the dye with [tex]R_f[/tex] value closest to 0.67 is the dye in food colouring 'G'.

5). At what temperature (K) will 0.854 moles of neon gas occupy 12.3 L at 1.95
atmospheres?

Answers

Answer:

338.38 K

Explanation:

Applying,

PV = nRT............... Equation 1

Where P = pressure, V = Volume, R = Temperature, n = number of moles, T = temperature.

Make T the subject of the equation,

T = PV/nR............. Equation 2

From the question,

Given: P = 1.95 atm, V = 12.3 L, n = 0.854 moles

Constant: R = 0.083 L.atm/K.mol

Substitute these values into equation 2

T = (1.95×12.3)/(0.854×0.083)

T = 338.38 K

Other Questions
hello please help ill give brainliest pls plz help urgent so easy will give brainliest mark for the first answer given!! -3(8n+10) distributive property NEED HELP ASAP WILL GIVE BRAINLIEST REAL ANSWERS ONLY PLZ WILL REPORT FAKE ANSWERS SPANISH 30 POINTS!!!You call your best friend to invite him (or her) to a concert. Nobody answers the phone so you decide to leave a message. Record the message that you would leave for your friend. Your message should be at least 5 complete sentences in Spanish. Inherited traits are:A Dependent on dietB Acquired during an organism's lifeC Free of mutationsD Passed on from parent to offspring why was the chinese exclusion act important Choose the inequality that represents the following graph Was Joseph A. Califano Jr. a liberal or conservative? 5% equals what fraction, in lowest terms? I need help I don't know who it is but they keep flagging me what do I do May I have help to figure out how to do this? It is confusing! :( correct answer gets brainlest, The answer is not 14-16 i already tried it i need help plz :( i dont understand What is Islamaphobia? *O The only way to stop terrorismO Mistreatment of Muslims in the USO A new type of governmentO A disease that makes you allergic to Islam X+2y=0 12y= -6x Plzzz this is due 11:59 Please help me with this. And my teacher said to show your work so what do I have to do and she said on paper please help thank you! A. 35B. 96C. 51D. 80 10. This question refers to the chart from the previous question.Which of the following conclusions is BEST supported by the scatter plot?OOOOA. Most dogs breeds have a maximum weight of 100 lbs or moreB. Most dog breeds have a maximum life span of 10 or fewer yearsC. All dog breeds that weigh less than 50 pounds have a maximum lifespan of more than 10 yearsD. No dog breeds that weigh more than 150 pounds are expected to live more than 10 years. "Hoovervilles were created byWashingtons government.American Indian tribes.the citys homeless.the citys workers.