Question

while preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory the concentrated sulphuric acid is added slowly to water with constant steering

Answer 1

yes it is true because a dilute acid is obtained by mixing the concentrated acid with water the process of mixing the concentrated acid with water is highly exothermic or heat producing so when a concentrated acid and water are mixed together a large amount of heat is evolved the dilution of a concentrated acid should be always be done by adding concentrated acid to water gradually with steering and not by adding water to concentrated acid this is because
(i)when a concentrated acid is added to water for preparing a dilute acid then the heat is evolved gradually and easily absorbed by the large amount of water
(I) if however water is added to concentrated acid to dilute it then a large amount of heat is evolved at once this it changes some of the water to steam explosively this can splashed the acid on your face or cloth and cause acid burns even the glass container may break due to the excessive heating


HOPE YOU UNDERSTAND BRO

Answer 2

Answer:

brainliest 5

Explanation:

(i) Concentrated sulphuric acid (H2 SO4 ) is a

hazardous, highly corrosive chemical. It has a

higher density than water and is hygroscopic,

which means that it absorbs water from the air.

(ii) In the process of dilution of concentrated

sulphuric acid with water, very large amount of

heat is liberated.

(iii) As a result, water gets evaporated instantaneously

along with splashing of acid which may cause an

accident.

(iv) To avoid this, required amount of water is

taken in a glass container and small quantity of

concentrated sulphuric acid at a time is added

with stirring.

(v) Therefore, only a small amount of heat is liberated

at a time.