Advertisements
Advertisements
Questions
Name the procedure used to prepare a sodium salt such as sodium sulphate.
Answer the following question related to salts and their preparations:
Name the procedure used to prepare a sodium salt such as sodium sulphate.
Solution 1
The name of the procedure used to prepare a sodium salt such as sodium sulphate is Neutralization of acid with base.
Solution 2
By neutralising alkali with acid. Pour the calculated 25 cm3 of NaOH into the flask. Using a pipette, add a few drops of phenolphthalein to it.
\[\ce{2NaOH + H2SO4 -> Na2SO4 + 2H2O}\]
Fill the burette with dil. H2SO4 upto zero mark from the burette add dil.H2SO4 drop by drop into the flask with constant stirring until pink colour just disappears. Transfer contents of flask to evaporating dish to evaporate water. On cooling crystals of [Na2SO4.10 H2O] are obtained.
\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]
APPEARS IN
RELATED QUESTIONS
Write a balanced chemical equation for the preparation of the following salts
Copper carbonate
How is the following salt prepared:
Sodium nitrate from sodium hydroxide.
Describe giving all practical details, how would you prepare:
lead sulphate from metallic lead.
How many salts can be obtained from ortho phosphoric acid? Is there any difference in the salts formed by the acid?
State how would you prepare copper (II) oxide from
Copper Carbonate
Some methods used for the laboratory preparation of salts are:
(a) Metal + acid
(b) Carbonate + acid
(c) Precipitation
(d) Direct combination
(e) Titration
Copy and complete the following table :
| Salt | Method of Preparation |
| Ammonium Sulphate | |
| Calcium carbonate | |
| Iron (III) chloride | |
| Lead nitrate | |
| Zinc sulphate |
Write equation for the laboratory preparation of the following salt, using sulphuric acid: Iron (II) sulphate from the iron.
From the list given below, select the word(s) required to correctly complete blanks (i) to (v) in the following passage. The words from the list are to be used only once. Write the answers as (a) (i), (ii) (iii) and so on. Do not copy the passage.
A solution M turns blue litmus red, so it must contain _______ ions; another, solution O turns red litmus blue and hence, must contain ______ ions.
Fill in the blanks with suitable words:
An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.
For each of the salt: A, B, C and D, suggest a suitable method of its preparation.
D is a soluble salt of zinc.
