Chemistry
Pure calcium carbonate and dilute hydrochloric acid are reacted and 2 litres of carbon dioxide was collected at 27°C and normal pressure.
CaCO3 + 2HCl ⟶ CaCl2 + H2O + CO2
Calculate:
(a) The mass of salt required.
(b) The mass of the acid required
Related Questions
The reaction between red lead and hydrochloric acid is given below:
Pb3O4 + 8HCl ⟶ 3PbCl2 + 4H2O + Cl2
Calculate
(a) the mass of lead chloride formed by the action of 6.85 g of red lead,
(b) the mass of the chlorine and
(c) the volume of chlorine evolved at S.T.P.
Find the mass of KNO3 required to produce 126 kg of nitric acid. Find whether a larger or smaller mass of NaNO3 is required for the same purpose.
KNO3 + H2SO4 ⟶ KHSO4 + HNO3
NaNO3 + H2SO4 ⟶ NaHSO4 + HNO3
Calculate the mass and volume of oxygen at S.T.P., which will be evolved on electrolysis of 1 mole (18g) of water
1.56 g of sodium peroxide reacts with water according to the following equation:
2Na2O2 + 2H2O ⟶ 4NaOH + O2
Calculate:
(a) mass of sodium hydroxide formed,
(b) volume of oxygen liberated at S.T.P.
(c) mass of oxygen liberated.