Acidic Solution Definition

Acidic Solutions in Chemistry

Blue litmus paper turns red under acidic conditions, while red litmus paper turns blue under basic conditions.
Blue litmus paper turns red under acidic conditions, while red litmus paper turns blue under basic conditions. David Gould, Getty Images
Updated February 26, 2016

Acidic Solution Definition

An acidic solution is any aqueous solution which has a pH < 7.0 ([H+] > 1.0 x 10-7 M).

Examples: Lemon juice, vinegar, 0.1 M HCl, or any concentration of an acid in water are examples of acidic solution.

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