It is hypothesised that the total mass of the three compounds will be the same number as if you were to add them up. The conservation of mass states that no mass is lost when two substances are combined, none is created either. The only thing that may happen is that these chemicals will be rearranged. No mass will be lost at all, so in the practical one adds 50 mL of Sodium Hydroxide and 50 mL of Copper Sulfate, these two combined will give a total of 100 mL, since no mass will be created or lost. The chemicals may react but no mass will be lost due to the conservation of mass. The dependent variable, is the no change in mass,and the independent variable, the reactants, will affect each other. Since the reactants are being mixed but the conversation