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Question
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, |
Copper carbonate, Sodium carbonate |
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Solution
(i) Preparation of Sodium Sulphate :
Sodium Carbonate + Dilute Sulphuric acid → Sodium Sulphate + Water + Carbon dioxide.
\[\ce{Na2CO3 + H2SO4 →Na2SO4 + H2O + CO2}\]
(ii) Preparation of Copper Sulphate :
Copper Carbonate + dilute Sulphuric acid → Copper Sulphate + water + carbon dioxide.
\[\ce{CuCO3 + H2SO4 → CuSO4 + H2O + CO2}\]
(iii) Preparation of iron (II) sulphate :
Iron + dilute Sulphuric acid → Iron (II) Sulphate + Hydrogen
\[\ce{Fe + H2SO4 → FeSO4 + H2}\]
(iv) Preparation of Zinc Carbonate :
\[\ce{Zn + H2SO4(dil) → ZnSO4 + H2}\]
\[\ce{ZnSO4 + Na2CO3 → ZnCO3 + Na2SO4}\]
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RELATED QUESTIONS
How is the following salt prepared:
Lead (II) oxide from lead.
You are provided with the following chemicals:
NaOH, Na2CO3, H2O, Zn(OH)2, CO2, HCI, Fe, H2SO4, CI2, Zn.
Using the suitable chemicals from the given list only, state briefly how you would prepare iron (III) chloride.
Give the preparation of the salt given in the left column by matching with the methods given in the right column. Write balanced equations for each preparation.
| Salt | Method of Preparation |
| Zinc sulphate | Precipitation |
| Ferrous sulphide | Displacement |
| Barium sulphate | Neutralization |
| Sodium sulphate | Synthesis |
State how would you prepare copper (II) oxide from
Copper Carbonate
Write equation for the laboratory preparation of the following salt, using sulphuric acid: Iron (II) sulphate from the iron.
Which of the following methods, (a), (b), (c), (d) or (e) is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once.
(a) Action of an acid on a metal.
(b) Action of an acid on an oxide or carbonate.
(c) Direct combination.
(d) Neutralization of an alkali by an acid.
(e) Precipitation (double decomposition).
(i) copper(II) chloride.
(ii) iron(II) chloride.
(iii) iron(IIl) chloride.
(iv) lead (II) chloride.
(v) sodium chloride.
Name the method used for preparation of the following salts from the list given below:
(i) Sodium nitrate
(ii) Iron (III) chloride
(iii) Lead chloride
(iv) Zinc sulphate
(v) Sodium hydrogen sulphate
List :
(a) Simple displacement
(b) Neutralization
(c) Decomposition by acid
(d) Double decomposition
(e) Direct synthesis
Explain the following method with example.
Direct combination
The following is a list of methods for the preparation of salts.
A – direct combination of two elements.
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Sodium sulphate.
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
D is a soluble salt of zinc.
