What is the concentration of [OH^-] in a 0.20 M solution of ammonia? The K_b value for ammonia is
1.8 *10^-⁵.

Question

What is the concentration of [OH^-] in a 0.20 M solution of ammonia? The K_b value for ammonia is 1.8 *10^-⁵.

Quizplus · Accepted Answer

The equation for the reaction of ammonia with water is:
NH3 + H2O ⇌ NH4+ + OH-
From this, we can see that for every 1 mole of NH3 that reacts, 1 mole of OH- is produced, so the concentration of OH- will be equal to the concentration of NH3. 
Therefore, [OH-] = 0.20 M.
Next, we can use the given value of KS1U1B1bS1U1B0 to calculate the concentration of [OHS1U1P1-S1S1P0] using the following equation:
KS1U1B1bS1U1B0 = [OH-][OHS1U1P1-S1S1P0] / [OHS1U1P0-S1S1P0]
Solving for [OHS1U1P1-S1S1P0], we get:
[OHS1U1P1-S1S1P0] = (KS1U1B1bS1U1B0 x [OHS1U1P0-S1S1P0]) / [OH-]
Plugging in the values, we get:
[OHS1U1P1-S1S1P0] = (8.1 x 10^-10 x 0.20) / 0.20
[OHS1U1P1-S1S1P0] = 1.9 x 10^-13 M, which corresponds to answer choice D.

What Is the Concentration of [OH-] in a 0

What Is the Concentration of [OH^-] in a 0