The pH of a solution is 5. The hydroxyl ion concentration in mol·dm⁻³ is:
Correct answer: B. 10⁻⁹
- A. 10⁻⁵
- B. 10⁻⁹
- C. 10⁵⋅⁵
- D. 10⁻⁷
Explanation
The relationship between pH and pOH is pH + pOH = 14. If the pH is 5, the pOH is 14 - 5 = 9. The hydroxyl ion concentration is [OH⁻] = 10⁻pOH = 10⁻⁹ M.
Last updated
Related questions
0.1 M HCl has pH = 1.0, it is about 100 times stronger than nitric acid. Then pH of acetic acid will be
1.0 M solution of NaOH is mixed with 1.0 M solution of H₂SO₄+ the solution formed is:
100 ml of each of 0.5 N NaOH, N/5 HCl and N/10 H2SO4 are mixed together. The resulting solution will be:
100 ml of N/5 NaOH will neutralize:
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35ml. The molarity of barium hydroxide solution was: