A 0.56 g sample of limestone is dissolved in acid and calcium is precipitated as…
CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A 0.56 g sample of limestone is dissolved in acid and calcium is precipitated as calcium oxalate. The precipitate is filtered, washed and dried and then dissolved in H2SO4 . The solution required 4mL of 0.25 N KMnO4 for oxidation of oxalate. The % of CaO in limestone is .....