Question

What is valency factor of acids in a given reaction?

• A. Number of replaceable $H^{+}$ ions; in the solution
• B. Number of ions of $H^{+}$ in solution
• C. Number of $H^{+}$ ions in one molecule of acid
• D. Number of gram - equivalents

Answer 1

The correct option is A

Number of replaceable $H^{+}$ ions; in the solution

Valency factor / n - factor is a very useful conversion factor by which we divide the molar mass of a substance to get the equivalent mass and it depends on the nature of the substance which varies from one condition to another condition.
Examples of valency factors for acids:
(i) HCl $\to$ valency factor = 1
(ii) $HN{O}_3$ $\to$ valency factor = 1

(iii) $H_{2}S{O}_3$ $\to$ valency factor = 1 or 2 depending on extent of reaction.