Water is a polar molecule, meaning it carries partial charges (î´ or î´â€“) on opposite sides of the molecule. for two formula units of kbr, drag two potassium ions and two bromide ions to where they would most likely appear based on the grouping of the water molecules in the area provided.

The side of each water molecule with the oxygen atom uncovered will be marginally negative. 
The side of each water molecule with the hydrogen atoms uncovered will be marginally positive. 
So the two Cl{-} particles will be pulled in to the biggest number of positive charges, which happen in the boxes on the upper right and lower left. 
The two Na{+} particles will be pulled in to the biggest number of negative charges, which happen in the boxes on the upper left and lower right.

D-no effect on the rate