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Example Questions
Example Question #1 : P H
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 approximately 40 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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