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Weak Bases

#### Q. Ammonia, NH3, is a weak base with a Kb value of 1.8x10^-5. What is the pH of a 0.120 M ammonia solution? Express your answer numerically to two decimal places.

Solved • Feb 17, 2020

Weak Bases

#### Q. If Kb for Nx3 is 3.0x10^-6, what is the pOH of a 0.175 M aqueous solution of NX3? Express your answer numerically.

Solved • Feb 17, 2020

Weak Bases

#### Q. After adding 13g of an unknown weak base to 1L of water, you find the pH of the solution is 11.58 and the percent ionization is 1.72%. What weak base did you add?

Solved • Mar 4, 2020

Weak Bases

#### Q. Calculate the pH of each of the following solutions (Ka and Kb values are given in Appendix D in the textbook). 0.125 M pyridine (C5H5N) Express your answer using two decimal places.

Solved • Feb 24, 2020

Weak Bases

#### Q. Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette smoke. Pyridine ionizes in water as follows: C5H5N + H2O ⇌ C5H5NH^+ + OH^- The pKb of pyridine is 8.75. What is the pH of a 0.115 M solution of pyridine? Express the pH numerically to two decimal places.

Solved • Feb 24, 2020

Weak Bases

#### Q. Ammonia, NH3, is a weak base with a Kb value of 1.8×10−5. What is the pH of a 0.230 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.

Solved • Feb 24, 2020

Weak Bases

#### Q. A 0.100 M solution of ethylamine (C2H5NH2) has a pH of 11.87. Calculate the Kb for ethylamine. Express your answer numerically using two significant figures.

Solved • Feb 24, 2020