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Question

Calculate the weight of lime ($$CaO$$) obtained by heating $$200kg$$ of 95% pure lime stone ($$Ca{CO}_{3}$$).

$$Ca{CO}_{3}\rightarrow CaO+{CO}_{2}$$


Solution

∵ 100 kg impure sample has pure $$CaCO_3$$ = 95 kg
∴ 200 kg impure sample has pure $$CaCO_3$$ = (95 x 200 / 100) = 190 kg.

$$CaCO_3 \rightarrow CaO + CO_2$$

∵ 100 kg $$CaCO_3$$ gives $$CaO$$ = 56 kg.
∴ 190 kg $$CaCO_3$$ gives $$CaO$$ = (56 x 190 / 100) = 106.4 kg.

Chemistry

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