Which term describes the scale used to express how acidic or basic a solution is?

Which term describes the scale used to express how acidic or basic a solution is?

• A. pH Scale
• B. Indicator
• C. Neutralization
• D. Matter

Answer: (A)

The pH scale is the measure used to express how acidic or basic a solution is. It runs from 0 to 14 under standard conditions, with 7 as neutral. Values below 7 indicate acidity, with lower numbers meaning stronger acids, while values above 7 indicate basic (alkaline) solutions, with higher numbers meaning stronger bases. The scale is logarithmic, so each unit represents a tenfold change in hydrogen ion concentration, which is why small shifts in pH reflect big changes in acidity or basicity. An indicator can show pH by color, but it’s not the scale itself. For example, lemon juice has a low pH and is acidic, while household baking soda has a higher pH and is basic. The pH scale is the standard way scientists describe how acidic or basic a solution is.

The pH scale is the measure used to express how acidic or basic a solution is. It runs from 0 to 14 under standard conditions, with 7 as neutral. Values below 7 indicate acidity, with lower numbers meaning stronger acids, while values above 7 indicate basic (alkaline) solutions, with higher numbers meaning stronger bases. The scale is logarithmic, so each unit represents a tenfold change in hydrogen ion concentration, which is why small shifts in pH reflect big changes in acidity or basicity. An indicator can show pH by color, but it’s not the scale itself. For example, lemon juice has a low pH and is acidic, while household baking soda has a higher pH and is basic. The pH scale is the standard way scientists describe how acidic or basic a solution is.