Describe giving all practical details, how would you prepare :

(a) copper sulphate crystals from a mixture of charcoal and black copper oxide,

(b) zinc sulphate crystals from zinc dust (powdered zinc and zinc oxide),

(c) sodium hydrogen carbonate crystals.

(d) Calcium sulphate from calcium carbonate.

Open in App

Solution

A)Copper oxide and charcoal, when heated together, will lead to the formation of copper metal and carbon dioxide. The copper metal can be reacted with sulphuric acid to form copper sulphate solution. Prepare a saturated solution of the copper solution. Suspend a seed from the thread in the solution to act as a base for crystallisation. Leave it for some time. Copper sulphate crystals will form on the seed.

$C u O + C ⟶ C u + C O$

$C u + H_{2} S O_{4} ⟶ S O_{2} + C u S O_{4} + H_{2} O$

B)Zinc dust with dilute sulphuric acid gives Zinc sulphate.

$Z n + H_{2} S O_{4} ⟶ Z n S O_{4} + H_{2}$

Here impure zinc is used because it has more surface area. More the surface area more will be the speed of the reaction. As well as impure zinc acts as an electrochemical cell.
C)
$N a H C O_{3}$ is made by saturating a solution of sodium carbonate with carbon dioxide. The white crystalline powder of sodium hydrogen carbonate is less soluble gets separated.

$N a_{2} C O_{3} + H_{2} O + C O_{2} ⟶ N a H C O_{3}$

On an industrial scale, sodium hydrogen carbonate $(N a H C O_{3})$ is obtained as an intermediate product in Solvay process for the manufacture of sodium carbonate

D)
Dissolving $C a C O_{3}$ in sulphuric acid $(H_{2} S O_{4})$ solution, you'll get $C a S O_{4}$ salt.

$C a C O_{3} (s) + H_{2} S O_{4} (a q) ⟶ C a S O_{4} (s) + C O_{2} (g) + H_{2} O (l)$

Calcium is a very strong reducing agent, its reduction potential is 2.87 V. Reduction potential of Hydrogen is 0 V
So calcium will displace hydrogen ions from the sulphuric acid

Suggest Corrections

Similar questions

Q. From the list of the substances given, name the substances which you would use to prepare each of the following salts:
List of substances: copper, lead, sodium, zinc, copper oxide, lead carbonate, sodium carbonate solution, dilute hydrochloric acid, dilute nitric acid and dilute sulphuric acid.
Salts: (a) zinc sulphate (b) copper sulphate (c) sodium sulphate (d) lead sulphate.

(h) Name from the list of the substances given below, the substance which you would use to prepare the salts given below:
Copper, Lead, Sodium, Zinc, Copper Oxide, Lead Carbonate, Sodium Carbonate Solution, dil. HCl, dil. HNO₃, dil. H₂SO₄.
Salts:
(i) Zinc sulphate
(ii) Copper sulphate
(iii) Sodium sulphate
(iv) Lead sulphate

Q. Write a balanced equation for the preparation of the following salts.
(i) Copper sulphate from Copper carbonate.
(ii) Zinc carbonate from zinc sulphate.

Q. Describe giving all practical details, how would you prepare by sodium hydrogen carbonate crystals.

Q. State how would you prepare copper (II) oxide from
(a) copper nitrate.
(b) copper carbonate.
(c) copper sulphate.

Join BYJU'S Learning Program

Explore more

Reaction of Metals with Acid

Standard X Chemistry

Join BYJU'S Learning Program