SAT II Chemistry : pH

Study concepts, example questions & explanations for SAT II Chemistry

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Example Questions

Example Question #2 : Reactions And Equilibrium

A scientist makes a solution by adding 0.2 grams of  to enough water so that the resulting solution has a volume of 10 liters. What, approximately, is the pH of this solution?

Possible Answers:

Correct answer:

Explanation:

 has a molar mass of 20 g/mol, meaning that there is 0.01 mol of it in the solution. Sodium hydroxide is a strong base and completely dissociates in water. Its concentration in the solution is  . This means that the concentration of  ions is  and . Thus, the pH of the solution is 11.

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