Question

Suppose that 0.0100 mol of NH3 are added to water and diluted to 1.00L at 25 degrees C. Calculate the pH of the solution assuming that Kb for ammonia is 1.8*10^-5

Answer #1

How many moles of NH3 are required in a 1.00L solution to create
a buffer with a pH of 9.13 if the solution contains 0.61 moles of
NH4Cl? Kb NH3 = 1.8 x 10-5?

A sample of 7.50 L of NH3 (ammonia) gas at 22 ∘C and 735 torr is
bubbled into a 0.450 L solution of 0.400 M HCl (hydrochloric acid).
The Kb value for NH3 is 1.8×10−5.
Assuming all the NH3 dissolves and that the volume of the
solution remains at 0.450 L , calculate the pH of the resulting
solution.

A sample of 7.70 L of NH3 (ammonia) gas at 22 ∘C and 735 torr is
bubbled into a 0.350 L solution of 0.400 M HCl
(hydrochloric acid).
The Kb value for NH3 is 1.8×10−5.
Part A:
Assuming all the NH3 dissolves and that the volume of the
solution remains at 0.350 L , calculate the pH of the resulting
solution.

How many grams of dry NH4Cl need to be added to 1.80 L of a
0.400 M solution of ammonia, NH3, to prepare a buffer solution that
has a pH of 8.83? Kb for ammonia is 1.8×10−5.

How many grams of dry NH4Cl need to be added to 2.20 L of a
0.500 M solution of ammonia, NH3, to prepare a buffer
solution that has a pH of 8.62? Kb for ammonia is
1.8×10−5.

How many grams of dry NH4Cl need to be added to 2.00 L of a
0.300 M solution of ammonia, NH3, to prepare a buffer solution that
has a pH of 8.64? Kb for ammonia is 1.8×10−5.

How many grams of dry NH4Cl need to be added to 2.10 L of a
0.700 M solution of ammonia, NH3, to prepare a buffer
solution that has a pH of 8.57? Kb for ammonia is
1.8×10−5.

How many grams of dry NH4Cl need to be added to 1.60 L of a
0.800 M solution of ammonia, NH3, to prepare a buffer solution that
has a pH of 8.81? Kb for ammonia is 1.8×10−5.

How many grams of dry NH4Cl need to be added to 2.50 L of a
0.500 M solution of ammonia, NH3, to prepare a buffer solution that
has a pH of 8.69? Kb for ammonia is 1.8×10−5?

17. A 25.0-mL sample of 0.20 M
NH3 is titrated with 0.20 M HCl. What is the pH
of the solution after 15.00 mL of acid have been added to the
ammonia solution? (NH3 has Kb = 1.8
x 10–5)
18. The Ksp of silver
chloride is 1.6 x 10–10. (a) Calculate
the molar solubility. (b) Dissolve 0.01 moles of
NaCl to 1.0 L of water; calculate the molar solubility of AgCl in
this salt water.

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