Q52 of 72 Page 96

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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