Question

Nitric acid (HNO3) is a strong acid, and it is titrated with a standard solution of sodium hydroxide (NaOH), a strong base. Which describes the pH of the equivalence point of the titration?
a. pH > 7.0
b. pH < 7.0
c. pH = 7.0

Answer 1

Answer: The correct answer is Option c.

Explanation:

pH is the measure of acidity of the solution. It is known as power of hydrogen. It is measured in a scale from 0 to 14. The solutions having pH from 0.1 to 6.9 is known as acidic solution, the solution having a pH of 7.1 to 14 is known as basic solution. The solution having pH 7 is known as neutral solution.

Nitric acid $(HNO_3)$ is a strong acid because it completely dissociates into its respective ions. The pH of this solution is very low.

Sodium hydroxide (NaOH) is a strong base because it completely dissociates into its respective ions. The pH of this solution is very high.

When a solution of low pH reacts with a solution of high pH, it results in the solution having a neutral pH which is 7.

Hence, the correct answer is option c.

Answer 2

C. pH = 7.0

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