Question

Arrange the following in order of increasing $pH$?

• A. Water < Blood < Soda water
• B. Water < Soda water < Blood
• C. Soda water < Water < Blood
• D. Soda water < Blood < Water

Answer 1

The correct option is C Soda water < Water < Blood

$pH$ of the solution is a measure of hydronium or hydrogen ion concentration in a solution.

• Higher is the hydrogen ion concentration lower is the $pH$ of the solution and the solution will be acidic. $pH$ range of acidic solution is $0-6.9$
• Lower is the hydrogen ion concentration, higher will be the $pH$ and solution will be basic. $pH$ of the basic solution ranges from $7.1-14$
• A solution having $pH$ $7$ is neutral.

Soda water is carbonated water so it has carbon dioxide present in it which reacts with water and form carbonic acid, therefore, it is acidic in nature having $pH$ between 3-4. The $pH$ of water is neutral i.e. $7$, while blood is alkaline in nature therefore its $pH$, will be above $7$ and in the range of $7.35-7.4$