White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62 g of white phosphorus with chlorine in the presence of water.
when white phosphorous react with chlorine:
P4 + 6Cl2
4PCl3
PCl3 + 3H2O 
H3PO3 + 4HCl ]*4
NET REACTION: BEFORE ADDING SECOND REACTION TO FIRST, MULTIPLY IT BY FOUR
P4 +6Cl2 +12H2O 
4H3PO3 +12HCl
Moles of white P= 
= 0.5mol
1mol of white P4 produce HCl = 12mol
0.5 mol of white P4 will produce HCl = 12*0.8 = 6mol
Mass of HCl = 6*36.5 = 219.0g
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