Question 19
Acids, Bases and SaltsThree drops of a 1.0mol dm−3 solution of NaOH are added to 20cm3 of a solution of pH 8.4. The pH of the resulting solution will be
- A.close to that of pure water
- B.unaltered
- C.greater than 8.4
- D.less than 8.4
Show the answer and explanation
Answer: C (greater than 8.4)
Explanation
Adding a strong alkali increases the hydroxide ion concentration, so the solution becomes more alkaline and its pH rises above 8.4.