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Write the experimental procedure to test...

Write the experimental procedure to test carbon dioxide gas.

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1) Pass the CO2 gas through lime water `[Ca(OH)_2]`.
2) The lime water appears as milky white
3) The reaction is `Ca(OH)_2+CO_2toCaCO_3dowN/Arrow+H_2O`.
4) The milky white is caused by `CaCO_3`.
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