What are the properties of aqueous solutions, Biology

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Which of the following is TRUE about the properties of aqueous solutions?

Select one:

a. A pH change from 5.0 to 6.0 reflects an increase in the hydroxide ion concentration ([OH-]) of 20 percent.

b. A pH change from 8.0 to 6.0 reflects a decrease in the proton concentration ([H+]) by a factor of 100.

c. Charged molecules are generally insoluble in water.

d. Hydrogen bonds form readily in aqueous solutions.

e. The pH can be calculated by adding 7 to the value of the pOH.

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