Acid

When dealing with hydrogen ions, an acid is the substance that increases its concentration in a solution. Additional hydrogen ions are added to a solution when acids dissolve in water. When there is a higher concentration of hydrogen ions in a solution than hydroxide ions, it is known as an acidic solution.

Depicted above is vinegar. It has a value of 3 on the pH scale, meaning it is more acidic than any other solutions with a value higher than 3, but not as acidic as those lower than 3. As the numbers decline on the pH scale, the more acidic the solution becomes (less than 7). This is because the concentration of hydrogen ions increase as the numbers lower on the scale.


Works Cited:
Campbell, Neil, Jane Reece, and Lawrence Mitchell. “Water and the Fitness of the Environment.” Biology. Fifth ed. Menlo Park: Jim Green Publishing, 1999. 43. Print.