Question

Find the amount of 25%H2So4 required to completely react with 25g CaCo3

Answer 1

CaCO3 + H2SO4 --------------- CaSO4 + H2O + CO2

25% H2SO4 ie 25g H2SO4 in 100g solution

Moles of H2SO4 = Given mass/Molar mass = 25/98 = 0.25 mol

Mass of CaCO3 = 25g

Moles of CaCO3 = Given mass/Molar mass = 25/100 = 0.25 mol