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10 gram of MNO2 on reaction with HCl forms 2.24 litre of Cl2 at NTP ,the percentage impurity of MNO2 is

10 gram of MNO2 on reaction with HCl forms 2.24 litre of Cl2 at NTP ,the percentage impurity of MNO2 is

Grade:12

1 Answers

ANIKET RAJ
56 Points
5 years ago
first write and balance the equation
MnO2 +4HCL---MnCl2+2H2O
A/Q
Moles of Cl2=2.24/22.4==0.1moles
now,
A/equation 
1mole cl2 react with 1 mole mno2
mole of mno2=0.1
wt. of mno2=0.1*55=5.5g
 
impurity=10g-5.5g=4.5g
%=4.5/10 *100=45%ans

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