Question

The equation between an acid and a base is

$\mathrm{XOH}+\mathrm{HY}\to \mathrm{XY}+{\mathrm{H}}_2\mathrm{O}$

Which of the following is the cation part of salt?

• A. $X$
• B. $OH$
• C. $H$
• D. $Y$

Answer 1

The correct option is A

$\mathrm{X}$

• When a base reacts with an acid, then salt and Water are formed. Such reactions are known as neutralization reactions.
• Example: When Sodium hydroxide ($\mathrm{NaOH}$) reacts with Hydrochloric acid ($\mathrm{HCl}$), then Sodium chloride ($\mathrm{NaCl}$) and Water are formed. The equation is:

$\mathrm{NaOH}\left(\mathrm{aq}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to \mathrm{NaCl}\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

• The salt formed in the neutralization reaction consists of the positively charged ion (cation) of a base and the negatively charged ion (anion) of an acid.
• The salt formed in the reaction between $\mathrm{NaOH}$ and $\mathrm{HCl}$ is $\mathrm{NaCl}$. The salt $\mathrm{NaCl}$ consist of a Sodium cation (${\mathrm{Na}}^{+}$) which is positively charged and Chloride anion (${\mathrm{Cl}}^{-}$).
• The Sodium cation comes from the base $\mathrm{NaOH}$ while the Chloride anion comes from the acid $\mathrm{HCl}$.
• In the given reaction $\mathrm{XOH}$ is a base, $\mathrm{HY}$ is an acid and $\mathrm{XY}$is a salt.
• $\mathrm{XY}$consists of ${\mathrm{X}}^{+}$cation which comes from base $\mathrm{XOH}$ and ${\mathrm{Y}}^{-}$ anion which comes from acid $\mathrm{HY}$. Hence, the cation part of salt is $\mathrm{X}$.

Hence, option (A) is correct. The cation part of salt is $\mathrm{X}$.