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CBSE Class 12-science Answered

CaCO3 decomposes to give CaO and CO2, if the masses of CaO and CO2 produced are 5.6g and 4.4 g respectively by heating 12g of an impure CaCO3 sample then the % impurity of the sample will be
Asked by amit.jhaamit.jha | 25 Apr, 2019, 06:50: PM
answered-by-expert Expert Answer
T h e space d e c o m p o s i t i o n space p r o c e s s space i s space g i v e n space b y space minus space S C space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space C a C O subscript 3 space rightwards arrow space C a O space space space space space space space space space space space space space space space space space plus space C O subscript 2 M o l e s space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space space space space space space space space space space space space space 1 G i v e n space M o l e s space space space space space space space space space space space space space space space space space space space space space x over 100 space space space space space space space space space space space space fraction numerator 5.6 over denominator 56 end fraction space equals 0.1 space space space space space fraction numerator 4.4 over denominator 44 end fraction equals 0.1 S o comma space M o l e s space o f space C a C O subscript 3 space equals space 0.1 space equals space x over 100 space s o comma space x space equals space 10 g T h u s space i m p u r i t y space p r e s e n t space equals space 12 minus 10 space equals 2 g percent sign space i m p u r i t y space equals space 2 over 12 cross times 100 space equals 16.7 percent sign
Answered by Sumit Chakrapani | 26 Apr, 2019, 06:51: AM

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