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 | 6th 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  | 7th Oct, 2010, 11:31: AM

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