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Question : 10
Total: 11
(i) Why is acidified water considered to be a good conductor of electricity?
(ii) Write a chemical equation showing the ionic products formed on dissolving potassium hydroxide in water.
(iii) Care must be taken while diluting concentrated nitric acid with water. Why?
(ii) Write a chemical equation showing the ionic products formed on dissolving potassium hydroxide in water.
(iii) Care must be taken while diluting concentrated nitric acid with water. Why?
Solution:
(i) When an acid is mixed with water, hydrogen ions are produced in the presence of water. The presence of these ions makes the acidified water a good conductor of electricity.
(ii) The following equation shows the reaction of potassium hydroxide with water by dissolving in it.
KOH ( s ) + H 2 O → K + ( aq ) + OH − ( aq )
(iii) The process of dissolving an acid or a base in water is a highly exothermic in nature. Care must be taken while mixing concentrated nitric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating.
(ii) The following equation shows the reaction of potassium hydroxide with water by dissolving in it.
(iii) The process of dissolving an acid or a base in water is a highly exothermic in nature. Care must be taken while mixing concentrated nitric acid with water. The acid must always be added slowly to water with constant stirring. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating.
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