If 6.3g of NaHCO3 are added to 10g of HCl solution, the residue is found to weigh 12g. What is the mass of CO2 released in the reaction?
A
43g
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B
21.5g
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C
50g
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D
4.3g
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Solution
The correct option is D4.3g NaHCO3+HCl→Residue+CO2 Weight of reactants = weight of NaHCO3+weight of HCl =6.3+10=16.3g Weight of product = weight of residue+weight of CO2 =12+x x→weight of CO2 released. a/c to law of conservation of mass Weight of reactants = weight of products 16.3=12+x ⇒x=16.3−12=4.3 Weight of CO2 released =4.3g