the ph scale is a measure of how __________ a solution is. what one word completes this sentence?

The pH scale measures how acidic a solution is.

This completes the sentence precisely, as pH quantifies acidity (or basicity) via hydrogen ion concentration on a 0-14 logarithmic scale.

pH Basics

Lower pH values (below 7) indicate stronger acidity, like stomach acid at pH 2; 7 is neutral (pure water); above 7 shows alkalinity, such as bleach at pH 13.

The formula is pH=−log⁡[H+]\mathrm{pH}=-\log[H^+]pH=−log[H+], where each unit change means a tenfold shift in ion concentration.

Why "Acidic"?

While pH spans acidity and basicity, the blank fits "acidic" best in standard phrasing, as seen in educational quizzes and texts matching your exact sentence.

Sources sometimes say "acidic or basic," but one-word completions favor "acidic" for simplicity.

Quick Examples

• Acidic : Lemon juice (pH ~2)

• Neutral : Water (pH 7)

• Basic : Soap (pH ~9)

TL;DR: "Acidic" is the one-word answer.

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