At 40°C, the ionic product of water, Kw , is:
Correct answer: B. 2.9×10⁻¹⁴
- A. 1.0×10⁻¹⁴
- B. 2.9×10⁻¹⁴
- C. 3.8×10⁻¹⁴
- D. 1.8×10⁻¹⁴
Explanation
The autoionization of water is an endothermic process. According to Le Chatelier's principle, increasing the temperature will shift the equilibrium to the right, increasing the concentrations of H⁺ and OH⁻. This results in a larger K value at higher temperatures; at 40°C, it is approximately 2.9×10⁻¹⁴.
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: