Question

a salt is dissolved in water and the PH of this solution is measured witha universal indicator paper .If the PH of the solution is less than 7, the salt is more likely to be... (a) CH3COONa (b) Na2CO3 (c)KCL (d)NH4CL

Answer 1

Answer:

( NH4Cl )........is the correct answer.

Explanation:

Answer 2

$NH_{4}Cl$ is most likely to be acidic among the given salts and hence the pH lower than 7.

• $CH_{3}COONa$ is a combination of weak acid that is $CH_{3}COOH$ which is also called the acetic acid and strong base NaOH. Hence the salt is more likely to be basic.
• $Na_{2}CO_{3}$ is also a made of strong base NaOH and a weak acid $H_{2}CO_{3}$, therefore the nature of the salt is more likely to be basic.
• KCl is made of strong acid HCl and strong base KOH, hence the nature of the salt will be neutral.
• For all these salts, an assumption has been made that all acids and bases are of equal strength and have been added in equal amounts.