Can someone please help me with this?

Question

A solution with a pH of _______ is mildly acidic.

A. 1

B. 4

C. 7

D. 10

E. 13

A solution with a pH of _______ is highly basic.

A. 1

B. 4

C. 7

D. 10

E. 13

 

A solution with a pH of _______ is highly acidic.

A. 1

B. 4

C. 7

D. 10

E. 13

Answer 1

Hi Jesset,

The boxed answers are correct. The main idea with pH is that it represents a "concentration" of how many H⁺ ions in a solution.

We use water as a reverence, and it's pH (log of the concentration of H⁺ ions) yields 7. Water is neither basic or acidic. So 7 is the "middle".

What you want to remember is that the lower the pH, the more acidic a solution is, whereas the higher a pH the more basic a solution is.

With that rule of thumb we find:

1 = very acidic

4 = slightly acidic

7 = neither

10 = slightly basic

13 = highly basic