1) What is oxidation-reduction reaction? Balance the reaction between potassium permanganate with oxalic acid in the presence of excess sulfuric acid?
2) What is normality? What is the normality of 1M H2SO4 solution?
3) Calculate the concentration of each substance when mixing 40.0 mL of 0.1 M CH3COOH and 10.0 mL of 0.1 M CH3COONa?
4) for system 1, how do you get 75 mL of water?