Sample Response: If a solution is an acid, then it will have a pH below 7, and if the solution is a base, it will have a pH above 7 since the pH value is determined by the concentration of H+ and OH– ions. What did you include in your hypothesis? Check all that apply. The “if” part of your hypothesis refers to the physical characteristics of the solution. The “then” part of your hypothesis refers to a measureable difference in pH. The “because” portion of your hypothesis connects the ideas of pH and H+ concentration.