Question

What is the [H+] in a 15.0 M NH3 solution (Kb = 1.8 x 10-5). You may assume that the equilibrium concentration of ammonia does not change from 15.0 M.

Answer #1

**
**

**Initial
15M
0
0**

**Final
(15-x)M
xM
xM**

**assuming 15-x is approximately equal to x**

Ammonia, NH3, is a weak base with a Kb value of
1.8×10−5.
A) What is the pH of a 0.340 M ammonia solution?
B)What is the percent ionization of ammonia at this
concentration?

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Ammonia, NH3, is a weak base with a Kb value of
1.8×10−5.
A) What is the pH of a 0.280 M ammonia solution?
Express your answer numerically to two decimal places.
B) What is the percent ionization
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Express your answer with the appropriate units.

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Ammonia, NH3, is a weak base with a Kb value of
1.8×10−5.
Part A
What is the pH of a 0.490 M ammonia solution?
Express your answer numerically to two decimal places.
What is the percent ionization of ammonia at this
concentration?
Express your answer with the appropriate units.

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Part A
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Part B
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Express your answer with the appropriate units.

a)You obtain a 0.817 M solution of NH4Cl. Knowing that the Kb of
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b) What is the [H+] in
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c) What is the pH of the solution in part
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midpoint of the titration?

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