Chapter 6

Mention any two methods of preparation of acids. Illustrate with equations.

How are basic salts formed?

How are soluble salts prepared by direct combination? Give an example.

What is the $\mathrm{pH}$ range in which phenolphthalein is colourless?

What are the $\mathrm{pH}$ values of the following solutions at ${25}^{\circ }\mathrm{C}$ ? (i) $0.001\mathrm{M}$ of $\mathrm{HCl}$ (ii) $0.05\mathrm{M}$ of ${\mathrm{H}}_2{\mathrm{SO}}_4$ (iii) $0.01\mathrm{M}$ of $\mathrm{NaOH}$

The formula of the basic salt formed by treating calcium hydroxide with $\mathrm{HCl}$ is

Which method is employed for the preparation of sulphate of $\mathrm{Ba}$, $\mathrm{Ca}$ and $\mathrm{Pb}$ ?

Define $\mathrm{pH}$ and give its mathematical representation.

What would be the nature of aqueous solutions of the following salts? (i) ${\mathrm{KNO}}_3$ (ii) ${\mathrm{Na}}_2{\mathrm{CO}}_3$ (iii) ${\mathrm{CH}}_3\mathrm{COONa}$

Define basicity of an acid. Give an example each for monobasic, dibasic and tribasic acids.