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ca oh 2 + co2 → caco3 + h2o
ca oh 2 co2 → caco3 h2o
ca oh 2 + co2 + h2o
ca oh 2 + ca hco3 2
ca oh 2 + co2
ca oh 2 + - caco3
caco3 + h2o + co2
caco3+h2o+co2 ca hco3 2
caco3+co2+h2o ca hco3 2
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