Question

what weight of sodium chloride is decomposed by 4.9 grams of sulphuric acid if 6 grams of sodium hydrogen sulphate and 1.825 grams of hydrogen chloride are produced in the same reaction?

Answer 1

let me try!
the reaction is:
                             NaCl    + H2SO4 -------->NaHSO4 +  HCl
Given mass(w)  :    x             4.9                     6               1.825

Molecular 
Weight(Mm)      :  58.44        98                      120            36.46

Moles(w/Mm)    : x/58.44      0.05                  0.05           0.05

From the above , we can observe that 0.05 moles of reactants would react to produce 0.05 moles of each of the products.

∴ Amount of NaCl consumed:
   x/58.44=0.05
   x=0.05 x 58.44
   x=2.92 gms

Answer 2

Answer:

2.92 grams

Explanation:

                            NaCl    + H2SO4 -------->NaHSO4 +  HCl

Given mass(w)  :    x             4.9                     6               1.825    

       now, simiply apply law of conservation of mass    

     

            x  +  4.9  =     6    +   1.825  

                         x=7.825-4.9        

                          x=2.925

                   

x=2.92 grams