Question

Some substances are acidic while others are basic. A scale called the pH scale is used to measure the extent of acidity. What will happen to the pH of the solution if a little acid is added to a beaker of water (original pH$=7$)?

• A. It will become a little less than $7$
• B. It will become a little more than $7$
• C. It will remain $7$
• D. It will become $0$

Answer 1

The correct option is A It will become a little less than $7$

If a little acid is added to a beaker of water (original $pH=7$), then $pH$ will become a little less than 7.
When we add acid to neutral water, hydrogen ion concentration increases. It will decrease $pH$ and the solution will become acidic.