Question

Which of the following is a base? Baking soda in water, pH 11 Milk, pH 7.1 Tomato juice, pH 4.1

Answer 1

Answer: Baking soda in water, pH=11

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxide ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

$pH=-\log [H^+]$

$pOH=-log{OH^-}$

$pH+pOH=14$

Thus baking soda in water, pH=11 is basic in nature.

Answer 2

The ph 11 milk because on the ph scale(0-14) a 7 is neutral anything under a 7 is a acid anything above a 7 is a base