Question

which scale measures the acidity or alkalinity of a substance?
a ph
b moh
c metric
d celsius

Explanation:

To determine which scale measures the acidity or alkalinity of a substance, we analyze each option:

• Option A: The pH scale is specifically used to measure the acidity or alkalinity (basicity) of a solution. It ranges from 0 (very acidic) to 14 (very alkaline), with 7 being neutral.
• Option B: "Moh" is not a recognized scale for measuring acidity/alkalinity.
• Option C: The metric system is a system of measurement for length, mass, volume, etc., not for acidity/alkalinity.
• Option D: Celsius is a scale for measuring temperature, not acidity/alkalinity.

Answer:

A. pH