Question

What do you observe when water is mixed with acid or base Class10

Answer 1

A large amount of heat is released when strong acids are mixed with water. Adding more acid releases more heat. If you add water to acid, you form an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container!

Answer 2

Answer:

Explanation:

Take 10 ml water in a test tube.

- Add a few drops of concentrated H2

SO4

to it and swirl the test tube slowly.

- Touch the bottom of the test tube.

•you will feel some temperature and I won't say that you can say that the given reaction is in endo (or) exothermic

Carry out the above activity with sodium hydroxide

pellets instead of H2

SO4

and record your observation.

The process of dissolving an acid or a base in water is

an exothermic process. Care must be taken while mixing

concentrated nitric acid or sulphuric 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 Look out for the warning sign

on the can of concentrated Sulphuric acid and on the bottle of sodium

hydroxide pellets.

Mixing an acid or base with water result in decrease in the concentration

of ions (H3

O +

/OH– ) per unit volume. Such a process is called dilution

and the acid or the base is said to be diluted.