what type of substance minimizes the changes in h+ and oh- in a solution.
An acid is any substance that increases the H+ concentration Transcript of An acid is any substance that increases the H+ concentration. An acid is any substance that increases the H+ concentration of a solution. A base is any substance that reduces the H+ concentration of a solution. Acids and Bases. The pH of a solution is determined by the relative concentration of hydrogen ions. Acidic solutions have pH values less than 7.