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QUESTION

How do you calculate the percent composition of sodium bisulfate (NaHSO4)?

Work out the ##M_r## by adding up the ##A_r## values as they occur in the formula, then work out the % contribution each element makes.

Work out the ##M_r## by adding up the ##A_r## values as they occur in the formula.

I'll use approximate values:

##A_rNa=23##

##A_rH=1##

##A_rS=32##

##A_rO=16##

##M_r## of ##NaHSO_4##:

##=23+1+32+(4xx16)=120##

Then work out the % contribution each element makes:

%##Na=(23)/(120)xx100=19.16##

%##H=(1)/(120)xx100=0.833##

%##S=(32)/(120)xx100=26.66##

%##O=(64)/(120)xx100=53.33##

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