CBSE Class 11-science Answered
What mass of 60% HCl(by mass) is required to completely react with 0.2 mol of zinc and what volume of
Asked by Ujjwal Kumar | 06 Oct, 2010, 10:40: AM
Expert Answer
According to stoichometry,
1 mole of Zn will give 2 mole of HCl
and, .2 mole of Zn is given.
Hence, moles of HCl will be .2/2=.1 moles of HCl
Number of Moles=wt/mol. wt
.1=wt of HCl/MOl.wt of HCl
.1=wt of HCl/36.5
wt of HCl =3.65 g
and, 60% of HCl is=2.19 g
We know that,
1 mole of gas has 22.4 L Volume
Here,
According to stoichometry,
1 mole of Zn will give 1 mole of H2
Hence, . 2 moles of H2
means, .2*22.4 L=4.48 L of H2
Answered by | 07 Oct, 2010, 11:31: AM
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