Question

CaCO^a+2HCl_CaCl^2+H2o+Co2​

Answer 1

CaCO3 + 2HCl -----> CaCl2 + H2O + CO2.

2.5g? g

Mass of CaCO3= 40+12+3(16)=52+ 48= 100.

Molar mass of CaCO3=100g.

Mass of CaCl2= 40 + 2(35.5)= 40+ 71= 111.

Molar mass of CaCl2=111g.

Mass of CaCO3 (g) Mass of CaCl2 (g)

For 100g of CaCO

3

, 111g of CaCl_2$$ is formed.

let for 2.5g of CaCO

3

, x g of CaCl

2

is formed.

Thus, by cross multiplication,

x=111×2.5/100=2.775g=2.78g.

Answer 2

a decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more element or new compounds these reactions of 10 involves an energy source such as light or electricity that breaks a part of the bones of compounds.