A solution contains Al3+ and Co2+ . The addition of 0.3696 L of 1.754 M NaOH results in the complete precipitation of the ions as Al(OH)3 and Co(OH)2 . The total mass of the precipitate is 23.05 g . Find the masses of Al3+ and Co2+ in the solution.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.