Limestone consists mainly. Истлеуова Асылай, ХБ-407

Limestone consists mainly of the mineral calcite, CaCO3. The carbonate content of 0.5413g of powdered limestone was measured by suspending the powder in water, adding 10.00 mL of 1.396 M HCl, and heating to dissolve the solid and expel CO2. CaCO3(s) + 2 H+ = Ca(2+) + CO2(g) + H20 FW 100.087 The excess acid required 39.96 mL of 0.1004 M NaOH for complete titration to a phenolphthalein end point. Find the weight percent of calcite in the limestone.