Ammonia is the most common and well-known weak base. a sample of household ammonia has a ph of 11.8. determine its concentration

The given question is incomplete. The complete question is:

A sample of household ammonia has a pH of 11.50. What is the hydronium ion concentration of this solution?

The hydronium ion concentration of the solution is

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration. Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.

Thus hydronium ion concentration of this solution is

The concentration is 1.58*10^-12 M

Explanation:

Step 1: Data given pH of ammonia = 11.8

pH = -log[H+] = -log[H3O+]

Step 2: Calculate the concentration

2H20(l) ⇆ H3O+ + OH-

Kw = [H3O+][OH-]

-pKw = log[H3O+] + log[OH-] = log 10^-14

-14 = log[H3O+] + log [OH-]

14 = - log[H3O+] - log[OH-]

14 = pH + pOH

[H3O+] = 10^-11.8

[H3O+] = [H+] = 1.58 * 10^-12 M

The concentration is 1.58*10^-12 M

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.