Multiple choice

A solution with a high concentration of hydrogen ions (H+) is

  1. basic

  2. isotonic

  3. acidic

  4. neutral

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

High hydrogen ion concentration defines acidic solutions (low pH). Neutral solutions have equal H+ and OH- concentrations, while basic solutions have low H+ and high OH- concentration. Isotonic refers to solute concentration equality across a membrane.