5. Hydrogen cyanide has the chemical formula HCN. The compound occurs as a colourless gas or a pale blue liquid. Its solution in water is called hydrocyanic acid. It reacts with water as per the reaction below. What is the pH of 0.176 mol/L solution of the above acid (K = 4.98 x 10')? a HCN(aq) + H₂O(l) ↔ CN¯(aq) + H₂O*(aq)

5. Hydrogen cyanide has the chemical formula HCN. The compound occurs as a colourless gas or a pale blue liquid. Its solution in water is called hydrocyanic acid. It reacts with water as per the reaction below. What is the pH of 0.176 mol/L solution of the above acid (K = 4.98 x 10')? a HCN(aq) + H₂O(l) ↔ CN¯(aq) + H₂O*(aq)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter14: Acids And Bases

Section: Chapter Questions

Problem 30QRT

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Question

5. Hydrogen cyanide has the chemical formula HCN. The compound
occurs as a colourless gas or a pale blue liquid. Its solution in water is
called hydrocyanic acid. It reacts with water as per the reaction
below. What is the pH of 0.176 mol/L solution of the above acid (K =
4.98 x 10')?
-9
a
HCN(aq) + H₂O(l) ↔ CN¯(aq) + H₂O*(aq)
(answer + units)

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