Question:

2 17 A 0 518 g sample of lime stone is dissolved in HCl and

Last updated: 7/4/2023

2 17 A 0 518 g sample of lime stone is dissolved in HCl and

2 17 A 0 518 g sample of lime stone is dissolved in HCl and then the calcium is precipitated as CaC O4 After filtering and washing the precipitate it requires 40 0 mL of 0 250 N KMnO4 solution acidified with H SO4 to titrate it as MnO4 H CrO2 Mn CO 2H O 2 4 2 The percentage of CaO in the sample is a 54 0 c 42 b 27 1 d 84