A quantity of white phosphorus was burned in an excess of oxygen. The product of this combustion was dissolved in water to give 1.258 L of solution. This solution was found to have a pH of 2.091.
(a) Write the equation for the combustion.
(b) What was the mass of the white phosphorus?
(c) The solution was treated with a solution of calcium nitrate, yielding a white precipitate. Write the chemical equation for this precipitation reaction.
(d) Assuming that sufficient calcium nitrate was added to give complete reaction, what was the mass of precipitate obtained?