Question

The pOH of a solution is 4.2. Which of the following is true about the solution?

It is acidic and has a pH of 6.8.
It is acidic and has a pH of 9.8.
It is basic and has a pH of 6.8.
It is basic and has a pH of 9.8.

Answer 1

Answer:

It is basic and has a pH of 9.8.

Explanation:

pOH = 4.2

we will determine its pH.

pOH + pH = 14

pH = 14 - pOH

pH = 14 - 4.2

pH = 9.8

According to pH scale the the pH lower than 7 is consider acidic while pH of seven is neutral and pH greater than 7 is basic.

The given solution has pH 9.8 it means it is basic.

Answer 2

Answer: D) It is basic and has a pH of 9.8.