Question

Study figure 8-1. when the ionic compound KI is dissolved in water, the I- ions are pulled into the solution by the attraction between
A.the K+ and I- ions.
B. The K + ion and the negative end of the water molecule.
C.the I- ion and the negative end of a water molecule
D. The I- ion and the positive end of a water molecule
PLEASE HELP

Answer 1

The best and most correct answer among the choices provided by your question is the second choice or letter B "The K + ion and the negative end of the water molecule."

First you may remember a tip: 

Like dissolves like. This means 

polar solvents will get polar and ionic substances dissolved and 

non-polar solvents will dissolve non-polar substances. 

In KI Potassium K is +vely charged and Iodie I is _negatively charged. 

In water H-O-H, Hydrogen is +vely charged and Oxygen is -negatively charged. 

Polar ends of water attract opposite ions of KI (or any other ionic or polar substance) thus the ionic compound will dissociate and will be dissolved.


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Answer 2

Answer is: D. The I⁻ ion and the positive end of a water molecule.

Dissociation of potassium iodide in water:

KI(aq) → K⁺(aq) + I⁻(aq).

Solvation is the interaction of solvent (water) with molecules or ions (in this example K⁺ and I⁻) in a solute.

Anion I⁻ has negative charge, so positive end (hydrogen atoms) of a water molecul attracts them.

Solvent (usually a liquid, but can also be a solid or a gas) is a substance that dissolves a solute.