Question

A 0.1 N solution of sodium bicarbonate has a ph of

Answer 1

8.4 ......it depends on pka

Answer 2

Hey dear,
You have posted incomplete question.

● Complete question should be -
Q. 0.1 N solution of sodium bicarbonate has a pH value A) 5.6 B) 7.0 C) 8.4 D) 4.0.

● Answer -
(c) 8.4

● Explanation -
- pH is the negative logarithm to the base 10 of concentration of H+ ions in a solution.
- As sodium bicarbonate is a base its pH must be between 7 to 14.
- Among given options, only option C) fits the criteria, therefore pH of 0.1 N sodium bicarbonate is 8.4 .

*Moreover, If Ka value of NaHCO3 is given, we can calculate pH by formula -
pH = pKa + log(conc.)

Thanks for asking...