1. HCN is a weak acid (Ka=6.20x10-10) , sothe salt, KCN , acts as a weak base. What isthe pH of a solution that is 0.0570 M in KCNat 25 °C?2. A solution was prepared with 0.464 molof pyridinium fluoride (C5H5NHF) andenough water to make a 1.00 L. Pyridine(C5H5N) has a Kb=1.70×10-9 and HF has aKa=6.30x10-4.

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Answered: 1. HCN is a weak acid (Ka=6.20×10-10) ,…

1. HCN is a weak acid (Ka=6.20×10-10) , so the salt, KCN , acts as a weak base. What is the pH of a solution that is 0.0570 M in KCN at 25 °C?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter13: Acids And Bases

Section: Chapter Questions

Problem 56QAP: Benzoic acid (K a=6.6105)is present in many berries. Calculate the pH and % ionization of a 726-mL...

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Concept explainers

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

Question

1. HCN is a weak acid (Ka=6.20x10-10) , so
the salt, KCN , acts as a weak base. What is
the pH of a solution that is 0.0570 M in KCN
at 25 °C?
2. A solution was prepared with 0.464 mol
of pyridinium fluoride (C5H5NHF) and
enough water to make a 1.00 L. Pyridine
(C5H5N) has a Kb=1.70×10-9 and HF has a
Ka=6.30x10-4.

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