Give the precise reason for each of the following-
a) Aqueous solution of a base conducts electricity.
b) Dry litmus paper does not change its colour with dry HCl gas but wet
litmus paper does.
c) Sour substances are not stored in metal containers.
d) Water should not be added to concentrated acid when we are
diluting it.
e) The reaction of metal oxide with acid can be considered as
neutralization reaction.
Answers
Answer:
a) the charged particles ions are present in the aqueous solutions Hydrogen and hydronium ions. These ions carry electric currents thus acids conducts electricity. Bases also conduct electricity in aqueous solution. Bases are also electrolytes that give ions in aqueous solutions and these ions help to conduct electricity.
b) Dry HCL it does not dissociate to give H+ ions. Acids dissociate to give ions only in the aqueous solution. In this, HCL is not in the aqueous form nor the litmus paper is wet, so the colour of the litmus paper does not change.
c) Curd and sour substances contain acids. Acids react with metals to produce salt and hydrogen gas. So, if such substances are kept in copper container, the acid will react and the container will be corroded.
d) If you add water to acid, you form an extremely concentrated solution of acid initially and the solution may boil very violently, splashing concentrated acid. If you add acid to water, the solution that forms is very dilute and the small amount of heat released is not enough to vaporize and spatter it. None.
e) Metal oxides are basic in nature. Thus, when an acid reacts with a metal oxide both neutralize each other. In this reaction, salt and water are formed. ... When an acid; such as hydrochloric acid; reacts with calcium oxide, neutralization reaction takes place and calcium chloride; along with water; is formed.