Chlorine is prepared in the laborat...
Question
Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with aqueous hydrochloric acid according to the reaction 4HCl(aq)+MnO2(s)→2H2O(ℓ)+MnCl2(a
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Chlorine is prepared in the laboratory by treating manganese dioxide ( left(mathrm{Mn} mathrm{O}_{2}right) ) with aqueous hydrochloric acid according to the reaction ( 4 mathrm{HCl}(mathrm{aq})+mathrm{MnO}_{2}(mathrm{s}) rightarrow 2 mathrm{H}_{2} mathrm{O}(ell)+mathrm{MnCl}_{2}(mathrm{aq})+mathrm{Cl}_{2}(mathrm{g}) ) How many grams of HCl react with ( 5.0 mathrm{g} ) of manganese dioxide?
(A) ( 8.4 mathrm{g} )
(B) ( 2.4 mathrm{g} )
(C) ( 1.4 mathrm{g} )
(D) ( 6.4 mathrm{g} )

JEE/Engineering Exams
Chemistry
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Chlorine is prepared in the laboratory by treating manganese dioxide (MnO2) with aqueous hydrochloric acid according to the reaction 4HCl(aq)+MnO2(s)→2H2O(ℓ)+MnCl2(aq)+Cl2(g) How many grams of HCl react with 5.0g of manganese dioxide?
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( HC1 )
Molar Mans ( =36.5 mathrm{g} ).
( mathrm{MnO}_{2} )
Molar Mars = 87 

( 5 g M n O_{2}=frac{5}{87} m o l )

require Ha = (4 times frac{5}{87})mol

(frac{20}{87} times 36.5g)

= 8.4g Ans (A)

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