Question
Sodium Sulphate:

Answer

Step – 1 : To write the symbols of the radicals (Basic radicals on the left and acidic radicals on the right)
$\mathrm{Na} \quad \mathrm{SO}_{4}$
Step – 2 : To write the valency below the respective radical.
Maharashtra Board Class 9 Science Solutions Chapter 4 Measurement of Matter 40
Step – 3: To cross-multiply as shown by arrows the number of radicals.
Maharashtra Board Class 9 Science Solutions Chapter 4 Measurement of Matter 41
Step – 4 : To write down the chemical formula of the compound.
$Na_2 SO_4$
(Sodium sulphate)

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