# Biochemistry - Water, pH and Macromolecules - Discussion

### Discussion :: Water, pH and Macromolecules - Section 1 (Q.No.27)

27.

The dissociation constant of H2O at 25° C is

 [A]. 10-14 M [B]. 1014 M [C]. 10-7 M [D]. 107 M

Answer: Option A

Explanation:

No answer description available for this question.

 Acj said: (May 15, 2016) This would imply that water is VERY BASIC which it is not, the correct answer is C which indicates water is neutral (ph=7).

 Mamta Joshi said: (May 23, 2017) The dissociation constant depend upon the temperature and pressure. The dissociation constant decreases as the temperature increases.

 Sunmathy said: (Jun 14, 2017) I don't understand it. Please, Help me!

 Ninoschka said: (Nov 28, 2017) The dissociation constant is the degree of dissociation of the ions of a molecule. In this case: H+ and OH-. The Pure water is completely ionized. therefore, has a neutral pH. pH = -log[H+] 7 = -log [H+] therefore, [H+] = 10^-7M.

 Selma said: (Dec 27, 2017) The Dissociation constant of water Kw = [H+][OH-] = 1 x 10-14. ie., 10-7 x 10-7.

#### Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.

#### Current Affairs 2019, 2020

Interview Questions and Answers