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

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

Answer 2

Answer: Baking soda in water, pH=11

Step-by-step 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.