Calculate the amount of 50 % H2SO4 required to decompose 25 g of marble (calcium carbonate).

Question

Calculate the amount of 50 % H2SO4 required to decompose 25 g of marble (calcium carbonate). (A) 24.5 g (B) 12.5 g (C) 98 g (D) 49 g

Tardigrade Admin · Accepted Answer

underset(100 g)CaCO3 + underset(98 g)H2SO4 → CaSO4 + H2O + CO2 100 g marble requires 98 g of H2SO4 25 g will need = (98/100) × 25 = 24.5 g of H2SO4 But H2SO4 provided is only 50 % so amount required will be = (24.5× 100/50) = 49 g

Q. Calculate the amount of 50%H2​SO4​ required to decompose 25g of marble (calcium carbonate).

24.5 g

12.5 g

98 g

49 g

(100g)CaCO3​​+(98g)H2​SO4​​→CaSO4​+H2​O+CO2​ 100g marble requires 98g of H2​SO4​ 25g will need =10098​×25 =24.5g of H2​SO4​ But H2​SO4​ provided is only 50% so amount required will be =5024.5×100​=49g

Q. Calculate the amount of $50% H_{2} S O_{4}$ required to decompose $25 g$ of marble (calcium carbonate).