2.Limestone consists mainly of the mineral calcite,
CaCO3. The carbonate content of 0.5413 g of
powdered limestone was measure 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) + 2H+ ïƒ Ca2+ + CO2(g) + H2O
FM= 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.