Question

Four samples A, B, C & D have pH values 12, 7, 2 and 9

respectively.

(i) Which of them is the most acidic?

(ii) Which of them have the highest concentration of Hydroxide Ion


please answer fast ill be grateful.thankyou​

Answer 1

I.The acid having less pH value is acidic that means 2= C

II.A because of its higher pH value