You mix 999 mL pure water and 1 mL of 2.0 M NaOH.Calculate the pH of the resulting solution.(assume the total volume is 1.0 L).
A)0)3
B)0)7
C)2)7
D)11.3
E)13.7

Question

Quizplus · Accepted Answer

The concentration of NaOH in the solution is 2.0 M * (1 mL / 1000 mL) = 0.002 M. NaOH is a strong base, so it fully dissociates in water, producing a hydroxide ion concentration ([OH-]) of 0.002 M. The pOH is calculated as -log[OH-] = -log(0.002) = 2.7. Since pH + pOH = 14, the pH of the solution is 14 - 2.7 = 11.3.

You Mix 999 ML Pure Water and 1 ML of 2.0