Chemistry
In the laboratory preparation of carbon dioxide by action of a dilute acid on a metallic carbonate give -
(a) A balanced equation for the preparation
(b) A reason for
(i) use of a washer bottle containing conc. H2SO4 in the preparation
(ii) Not collecting the prepared gas over water
(iii) Not using dilute sulphuric acid as a reactant in the preparation.
Carbon dioxide
22 Likes
Answer
(a) CaCO3 + 2HCl [dil.] ⟶ CaCl2 + H2O + CO2
(b) (i) The evolved carbon dioxide is passed through the washer bottles containing conc. H2SO4, to absorb moisture.
(ii) Carbon dioxide is fairly soluble in water, hence, it is not collected over water,
(iii) Dilute sulphuric acid reacts with calcium carbonate forming a coating of insoluble calcium sulphate on the marble chips thereby the reaction slowly comes to a stop.
CaCO3 + H2SO4 [dil.] ⟶ CaSO4 [insoluble] + H2O + CO2
Answered By
15 Likes
Related Questions
'Wood charcoal' - an amorphous allotrope of carbon reduces heated metallic oxides to metals. Give a balanced equation to support the statement.
Carbon dioxide occurs both in the free state and in the combined state. State three methods how carbon dioxide is added to the atmosphere.
How would you prove experimentally that
(a) Carbon dioxide does not support combustion
(b) Is slightly acidic in nature.
Starting from carbon dioxide how would you obtain
(a) A weak acid
(b) A fertilizer
(c) A highly poisonous gas
(d) Black particles of carbon.
[Give balanced equations for the same]