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प्रश्न
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.
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उत्तर
The best method of preparing sodium sulphate is the method D – titration of a dilute acid with a solution of soluble base.
\[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2\uparrow}\]
\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]
संबंधित प्रश्न
How is the following salt prepared:
Lead (II) oxide from lead.
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 for preparing the following salts by giving a suitable equation in each case:
- Anhydrous ferric chloride,
- Lead chloride,
- Sodium sulphate,
- Copper sulphate.
State how would you prepare copper (II) oxide from
copper 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:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron (II) sulphate
(iv) Zinc carbonate
| Dilute sulphuric acid |
Copper, Iron, |
Copper carbonate, Sodium carbonate |
Choosing the correct words given in brackets, complete the sentence given below: Sodium sulphate from sodium carbonate.
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.
Give the equation for the preparation of the following salt from the starting material given.
Iron (III) Chloride from Iron
Give the equation for the preparation of the following salt from the starting material given.
Potassium sulphate from potassium hydroxide solution
Match the salts underlined in Column A with the most suitable method of preparation given in Column B.
| Column A | Column B | ||
| (a) | \[\ce{ZnCl2 \text{from} Zn}\] | 1. | Precipitation |
| (b) | \[\ce{KNO3 \text{from} KOH}\]. | 2. | Direct combination |
| (c) | \[\ce{CaCO3 \text{from} CaCl2}\]. | 3. | Displacement reaction |
| 4. | Neutralization |
Select the word/s given which are required to correctly complete the blanks.
When solution M and O are mixed together, the products will be ______ and ______.
