Calculate the weight of lime (CaO) obtained by heating 200 kg of 95% pure lime stone `(CaCO_3)`.

Options

A. `104.4 kg`
B. `105.4 kg`
C. `212.8 kg`
D. `106.4 kg`

Answer

D

Explanation

`because 100 ` kg impure sample has pure `Ca CO (3) = 95 kg`
`therefore 200 kg` impure sampe has pure `Ca CO _(3) = ( 95 xx 200)/(100) = 190 kg`
`Ca CO _(3) to Ca O + CO _(2) therefore 100 kg Ca CO _(3) = ( 95 xx 200)/(100) = 190 kg.`
`Ca CO _(3) to Ca O + CO _(2) therefore 100 kg Ca CO _(3)` gives `56 kg CaO `
190 kg `Ca CO_(3)` gives `Ca O = ( 56 xx 190)/(100) = 106. 4 kg`