2. Phosphine, PH, is formed when calcium phosphide is added to water according
to the following reaction:
Ca,P₂ + 6H₂O-
3Ca(OH)₂ +2PH,
a. How many moles of phosphine, PH,, can be obtained from the reaction of 2.5 g
of water?
-
b. If 25g of Ca,P, is used in a separate reaction from the one in 2a. and 9.17 g of PH,
is recovered in the experiment, what is the % yield of PH, in the reaction?
