Question

Which of the following would not change the pH of 10 cc of dilute $HCl$ when added?

• A. 5 cc of pure water
• B. 20 cc of pure water
• C. 10 cc of pure water
• D. 20 cc of dil $HCl$ of same concentration

Answer 1

The correct option is D 20 cc of dil $HCl$ of same concentration

For same pH, concentration should remain same. When we add to volumes of same concentration, new concentration remains same
$\therefore$ pH won't change for option $D$