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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