14 and 16

14. In a basic solution, permanganate MnO4is usually reduced to MnO2 rather than Mn2+. Write an equation for the oxidation of UO2 to UO3 in a basic solution, assuming that the permanganate is reduced to manganese dioxide. 15. Sodium chlorate NaClO3 has been used to oxidize uranium (IV) to uranium (VI). Assuming that the chlorate is reduced to Cl, write a balanced equation for the oxidation of UO2 to UO3 in an acidic solution. 16. When added to uranyl solutions, magnesia MgO can precipitate uranium as a hydrated uranium trioxide UO3xH2O. Write a balanced equation for this reaction. (Hint: MgO is converted to Mg2+.)