Homework Help: difficult chemistry

Posted by Fai on Saturday, January 12, 2013 at 8:52pm.

502g sample of dry cac03 and cacl2 mixture was dissolved in 25ml of 0.925 M HCL solution. What was cacl2 percentage in original sample if 22ml of 0.09312 m NAOH was used to titrated excess HCL?

The answer 29.89%

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