(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

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Solution

(i) Zinc sulphate is prepared by reacting zinc with dilute sulphuric acid. The equation is as follows:

Zn + H₂SO₄ → ZnSO₄ + H₂

(ii) Copper sulphate is prepared by reacting copper oxide with dilute sulphuric acid. The equation is as follows:

CuO + H₂SO₄ → CuSO₄ + H₂O

(iii) Sodium sulphate is formed by reacting sodium metal or sodium carbonate with dilute sulphuric acid. The equation is as follows:

Na₂CO₃ + H₂SO₄ → Na₂SO₄ + H₂O + CO₂
2Na + H₂SO₄ → Na₂SO₄ + H₂

(iv) Lead metal or lead carbonate reacts with dilute sulphuric acid to form lead sulphate. The equation is as follows:

Pb + H₂SO₄ → PbSO₄ + H₂
PbCO₃ + H₂SO₄ → PbSO₄ + H₂O + CO₂

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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.

Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain :

(a) Sodium sulphate, (b) Copper sulphate,

$\begin{matrix} Dilute sulphric acid & C o p p e r & C o p p e r c a r b o n a t e Iron & S o d i u m C a r b o n a t e Sodium Zinc \end{matrix}$

Choosing the substances from the list given below, write balanced chemical equations for the reaction which would be used in the laboratory to obtain the following salts.

[Dilute sulphuric acid, Copper, Copper(II) carbonate, Iron, Sodium carbonate, Sodium chloride, Zinc nitrate]

Zinc carbonate salt :

Q. (a) Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate

Dilute sulphuric acid

Copper
Iron
Sodium, Zinc

Copper carbonate
Sodium carbonate

(b) From the formulae listed below, choose one, in each case, corresponding to the salt having the given description:
AgCl, CuCO₃, CuSO₄·5H₂O, KNO₃, NaCl, NaHSO₄, Pb(NO₃)₂, ZnCO₃, ZnSO₄·7H₂O.
(i) An acid salt.
(ii) An insoluble chloride.
(iii) On treating with concentrated sulphuric acid, this salt changes from blue to white.
(iv) On heating this salt changes from green to black.
(v) This salt gives nitrogen dioxide on heating.

(b) From the list of substances given below, choose the pair required to prepare the salts (i) to (iii) in the laboratory and write down the relevant equations. The substances are
chlorine, iron, lead, lead nitrate solution, sodium nitrate solution, iron (III) carbonate, lead carbonate, iron (III) hydroxide, sodium hydroxide solution and dilute hydrochloric acid. The salts are
(i) sodium chloride.
(ii) lead chloride.
(iii) anhydrous iron (III) chloride.

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