Question

The graph given below depicts a neutralization reaction (acid + alkali → salt + water). The pH of
a solution changes as we add excess of base to an acid.
Which letter denotes the area of the graph where both acid and salt are present, also the colour
shown in pH solution
a. A, Blue b. B, Green c. C, Orange d. D, Red

Answer 1

Answer:

A ,blue

Explanation:

As we add alkali to an acid, solution will become alkaline in nature where PH ranges above 7

Answer 2

The correct option is A.

• The pH of salt or neutral substance is 7.
• The pH of acid is in the range of below 7 and basic substances have a pH greater than 7.
• The addition of acid changes the colour to red and the addition of base change the colour to blue.
• So, when we add an excess base to acid the pH of the solution changes to the basic range and the colour of the solution become blue.