white phosphorus reacts with dilute aq. solutions of copper (II) sulfate to deposit metallic copper and produce a strongly alkaline sol.
In an experiment to investigate this reaction, 0.31g of white phosphorus reacted in excess aq. copper sulfate giving 1.6g of metallic copper.
(i) Calculate the new oxidation number of the phosphorus after the reaction.
(ii) In the reaction, the phosphorus forms an acid HPOn, what is the value of n.