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Question
Write a balanced equation for the preparation of the following salts:
Copper sulphate from Copper Carbonate.
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Solution
`CuCO_3 + H_2SO_4 -> CuSO_4 + CO_2 + H_2O`
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RELATED QUESTIONS
What are the two main ways in which common salt (sodium chloride) occurs in nature?
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
Explain how anhydrous copper sulphate can be used to detect the presence of moisture (water) in a liquid.
Give one example of a salt which gives an aqueous solution having:
pH more than 7
Write the name and formula of one salt which contains:
Five molecules of water of crystallisation
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will have no effect on litmus solution?
Answer the following questions below, relating your answers only to salts in the following list:
Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water.
(i) What is the name given to the water in the compound copper sulphate-5-water?
(ii) If copper sulphate-5-water is heated, the water is driven off leaving anhydrous copper sulphate. What is the colour of anhydrous copper sulphate?
(iii) By what means, other than heating, you can dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate?
(iv) Which one of the salts in the given list is deliquescent?
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions.
- When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
- The addition of dilute hydrochloric acid to B produces a gas which turns lead acetate black on paper.
- When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed.
- When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
- The addition of dilute hydrochloric acid to E produces effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
