Question

Give formula of the following by Criss cross method.
(a) Potassium hydrogen sulphide.
(b) Ammonium carbonate
​

Answer 1

Explanation:

(a)K2S04

(b)(NH4)2C03

Answer 2

To do:

Formula of the following by Criss cross method.

(a) Potassium hydrogen sulphide.

(b) Ammonium carbonate.

Solution:

Potassium Hydrogen Sulphate:

${K}^{ +1 } \: \: \: \: \: {HSO_{4}}^{ - 1}$

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$KHSO_{4} \: \: \: \: \: \: \implies \: formula$

Ammonium Carbonate:

${NH_{4}}^{+1} \: \: \: {CO_{3}}^{-1}$

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$NH_{4}CO_{3} \: \: \: \: \: \implies \: formula$

Method of Criss-Cross method:

• First write down the cation and anion or radicles in a single line.

• Criss-Cross the valency of each component and then join the molecule.

• Then represent the molecule in its lowest whole number ratio.