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a 10g sample of a mixture …

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a 10g sample of a mixture of calcium chloride and sodium chloride is treated with sodium carbonate to precipitate the calcium as calcium carbonate this caco3 is heated to convert all the calcium to cao and the final mass of cao is 1.62g the % by mass of cacl2 in the original mixture is

    • Posted by Birajdar Suresh 6 years, 5 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Abhiyank Rajouria 6 years, 5 months ago

    CaCO3 +heat--->CaO +Co2 X gms               1.68gms 100                   56 [molecular mass of CaCO3=100u molecular mass of CaO=56u] cross multiply through the equation and solve for x grams of caco3 x=1.62x100/56 =2.89g Cacl2 +Na2Co3 --->Caco3 +2 Nacl x                             2.89g 111                         100 Again cross multiply through the equation and solve for x grams of Cacl2 x=2.89x 111/100 =3.2g %CaCl2 in original mixture 3.2grams Cacl2 over 10gms mixture is 32% Hope it helps ?

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