Question
Explain salt hydrolysis. Name two salts which are (a) acidic (b) basic (c) neutral, when dissolved in water.

Answer

Salt hydrolysis: The reaction between a salt and water to produce an acid or a base is called salt hydrolysis or hydrolysis. By hydrolysis the salt, we can find out its parent acid and parent base.
For example :
$
NaCI + H _2 O \longrightarrow Na ^{+}+ CI ^{-}
$
Salt which are acidic :
(i) Ammonium sulphate
(ii) Ammonium chloride
Salt which are basic :
(i) Potassium carbonate
(ii) Sodium acetate
Salt which are neutral:
(i) Ammonium acetate
(ii) Ammonium Carbonate.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Explian the following :
Dil. HCl acid is stronger than highly concentrated acetic acid.
How will you show that hychloric acid contains both hydrogen and chlorine (other than by electrolysis) ?
$10g$ of $NaCl$ solution is mixed with $17g$ of silver nitrate solution. Calculate the weight of silver chloride precipitated.
$AgNO_3 + NaCl \rightarrow AgCI + NaNO_3$
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below:
(i) When silver nitrate solution is added to asolution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
(ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black.
(iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test, a brown ring is formed.
(iv) When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
(v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns limewater milky but does not affect acidified potassium dichromate solution.
Salt Anion
A
B
C
D
E
The following is an extract from 'Metals in the service of Man, Alexander and street /Pelican 1976':
'Alumina (aluminium oxide) has a very high melting point of over $2000^oC$ so that it cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, can occur when it is dissolved in some other substance'.
(a) Which solution is used to react with bauxite as a first step in obtaining pure aluminium oxide?
(b) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the balanced chemical equation for this reaction.
(c) Name the element which serves both as the anode and the cathode in the extraction of aluminium.
(d) Write the balanced chemical equation for the reaction that occurs at the cathode during the extraction of aluminium by electrolysis.
(e) Give the balanced chemical equation for the reaction which occurs at the anode when aluminium is purified by electrolysis.
Choose the most appropriate answer from $( SO_2 , SiO_2 , Al_2O3 , CO , MgO , Na_2O )$
(a) A covalent oxide of a metalloid.
(b) An oxide which when dissolved in water form acid .
(c) A basic oxide
(d) An amphoteric oxide.
A cylinder contains $68g$ of ammonia gas at $\text{STP}$
$(1)$ What is the volume occupied by this gas?
$(2)$ How many moles of ammonia are present in the cylinder?
$(3)$ How many molecules of ammonia are present in the cylinder? $[N-14,H-1]$
In order to obtain 1 tonne of aluminium the following inputs are required. 4 tonnes of bauxite, $150 kg$ of sodium hydroxide and $600 kg$ of graphite. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide, Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite
1. Write the formula of cryolite.
2. Write down the word which correctly completes the following sentence. By dissolving aluminium oxide in cryolite a (conducting/non-conducting) solution is produced.
3. Why is so much graphite required for the electrolytic process?
4. Write the equation for the reaction which takes place at the cathode.
5. What is cathode made up of?
Give a balanced chemical equation for each of the following :
(i) Action of conc. nitric acid on sulphur.
(ii) Catalytic oxidation of ammonia.
(iii) Laboratory preparation of nitric acid.
Explain, why (or give reasons for)
A solution of HCl gas in water turns blue litmus red and conducts electricity, while HCI gas dissolves in toluene and it has no effect on litmus and does not conduct electricity.