If the amount of hydroxide ions in a solution is increased, what will happen to its pH?
Answer and explanation
Correct answer: The pH will increase
The pH scale describes the acidic or basic nature of an aqueous solution. A higher concentration of hydroxide ions, [OH⁻], makes the solution more basic. Because pOH decreases as [OH⁻] increases and pH + pOH = 14 at 25°C, the pH rises, generally above 7. Thus option A is correct. Option B describes increasing acidity, while C and D are not general consequences of adding hydroxide ions.
Frequently asked questions
What is the correct answer to this question?
The pH will increase
Why is this the correct answer?
The pH scale describes the acidic or basic nature of an aqueous solution. A higher concentration of hydroxide ions, [OH⁻], makes the solution more basic. Because pOH decreases as [OH⁻] increases and pH + pOH = 14 at 25°C, the pH rises, generally above 7. Thus option A is correct. Option B describes increasing acidity, while C and D are not general consequences of adding hydroxide ions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
