Question

A solution which gives blue colour with universal indicator on reaction with
HCl gives a salt (X) which is used as a raw material to prepare chlorine.

a) Identify the salt and write the chemical name of the salt.

b) What will be the pH value of the aqueous solution of the salt (x)?

c) Name the force which holds the constituent of this salt and comment on the
strength of the force.
d) Write the chemical equation involved in the preparation of Cl2 from salt(x)

Answer 1

Diapermagnet
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Answer 2

Answer:

Salt X is Sodium chloride and the Solution tested with universal indicator is Sodium hydroxide.

Explanation:

A) The Salt X is Sodium chloride(NaCl).

B) The Salt X is formed by the reaction of a strong acid (HCl) and a strong base (NaOH), therefore it is a neutral salt having a pH of 7 as an aqueous solution.

C) NaCl is an ionic compound. The force that holds the ions H+ and Cl- together is the strong electrostatic force of attraction between the ions. This force is not easy to break compared to covalent bonds.

D) Chloralkali process

                              (electricity)

2NaCl (aq) + 2H₂O (l)     →      2NaOH(aq) + H₂(g) + Cl₂(g)

The electrolysis of brine will produce chlorine gas.

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