Question

In an experiment to measure the pH values by using a universal indicator, a student found that the pH values of four given solutions A, B, C and D are 10, 6, 2 and 14 respectively. The solution which will require the maximum volume of sodium hydroxide solution for complete neutralisation is solution (1) A
(2) B
(3) C
(4) D

Answer 1

Answer:

C

Explanation:

Ph value from 0 to 7 are called acids

The least the value of ph, the stronger the acid

For neutralisation, a base should be added to an acid. As C has more acidic nature, it requires more NaOH

Answer 2

(3) Solution C requires maximum volume of sodium hydroxide for neutralization.

Explanation:

• According to the question, the pH values of the solutions A, B, C and D are 6, 12, 2 and 14. It is to be noted that when the value of pH decreases, acidity increases.
• When the pH value of the solution increases, it becomes basic. Among the four solutions, solution C is strongly acidic and solution D is strongly basic. So, sodium hydroxide should be added to solution C to neutralize it.