The following questions pertain to aqueous solutions of potassium bromide.

A. Draw a representation that shows the interactions between the solute and solvent in an aqueous solution of potassium bromide.

B. Explain why potassium bromide dissolves in water

A. KBr dissociates (dissolves) when in water. So draw a solution with potassium ions and bromine ions. Since the potassium ion has a positive charge, the oxygen of H2O molecules (negative charge, because water molecules are polar) will be attracted towards the potassium ion with a positive charge. Also draw bromine ions (negative charge), with the hydrogen ends of water molecules attracted to it (because the hydrogen end of water molecules have a positive charge). Make sure the amount of potassium ions and bromine ions are equal because the ratio of potassium to bromine is 1:1

B. According to solubility rules, Br - is soluble with everything else except Ag 2+, Hg2 2+, and Pb 2+. SInce potassium is neither of the three, Br is soluble when with K.