- Q15.16 Homework - Unanswered What is the pH for a solution with [OH-] = 8.9 x 10-9M? Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal eg 2.5E5 for 2.5 x 10") Type your numeric answer and submit Unanswered 2 attempts left Submit Method 2: Convert [OH-] to pOH, then convert pOH to pH. [ Fullscreen Q15.18 Homework Unanswered What is the pH of a 0.67 M HBr solution? Respond with the correct number of significant figures in scientific notation (Use Enotation and only 1 digit before decimale.g. 2.5E5 for 2.5 x 10) Type your numeric answer and submit