1. Find out the three components of the enthalpy change in forming a solution. Clearly label and explain the symbols used.

2. For the solution process with a positive value of ΔHsoln, what must be the relationship between the three enthalpy components?

3. For the solution process with a negative value of ΔHsoln, what must be the relationship between the three enthalpy components?

4. Which are stronger: the bonds in the NH4Cl(s) OR the intermolecular forces formed between the ions in a solution and molecules of water?

5. Name at least three common substances which have the opposite sign of enthalpy of solution to that of NH4Cl.

6. How can we predict the relative pH of salt solutions from their composition?