Question

Calculate the pH for following solutions and state if they are acidic, basic or neutral:

a. [H3O+] = 2.35 × 10-3M

b. [H3O+] = 3.35 × 10-10M

Answer 1

The answer to this question is quite simple

The ph = -log[H+]

Where [H+] is concentration of H+ or H₃O + ions

So just simply putting the values in equation

A)

[H3O+] = 2.35 × 10-3M

-log [2.35 × 10^-3]

= 2.63

As The ph is below 7 it is acidic in nature

B]

[H3O+] = 3.35 × 10-10M

-log[3.35 × 10^-10]

= 9.47

As it is more than 7 it is basic in nature

I hope this helps. If you have any query or want more detailed explanation, feel free to ask in the comments section below.