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Chemistry - Estimation of Mass Required in a Reaction

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With the reaction, CaCO3+2Hcl->CaCl2+H2O+CO2. Using percent by mass what is the weight of HCl needed to react with calium carbonate? The weight of calcium carbonate that reacted with hydrochloric acid is 2.66.

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CaCO3 + 2HCl

CaCl2 + H2O + CO2

For complete reaction, 1 ...

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