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September 18, 2014

Homework Help: math Steve helps me

Posted by Fai on Wednesday, December 25, 2013 at 6:44pm.

1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8 m Hcl. The excess of acid required 16ml of 0.25< NAOH for neutralization. Calculate the percentage of cac03 and mgc03 in the sample

The right answer mgc03 52.02% and caco 47.98%

You need to use 3 solution of drug H containing respectively 50%, 20% and 5% to make 600ml of 10% drug H. How much of the 50% will you use?

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