Question

10 g of reacted with 19.6 g cac03 of h2so4 and 6g caco3 remained unutilized. What was the percent purity of h2s0 ? (Mo of Ca = 40, C = 12, O = 16, H = 1, S = 32)

Answer 1

Answer:

150 mL of N/10 HCl is required to react completely with 1.0 g of a sample of limestone. Calculate the percentage purity of calcium carbonate.

150 mL N10HCl≡ 150 mL N10CaCO3 Mol. massCaCO3 + 2g eq.2HCl→ CaCl2 + H2O + CO2 Eq. mass of CaCO3 = 40 + 12 + 482 = 1002 = 50 Mass of CaCO3 present in