Question

What are the similarities between acids and bases?

Answer 1

Acids and bases are both on the extreme ends of the pH scale, change the color of litmus paper and other indicators, and are not good for most "normal" life.

Explanation:

They have unusually high or low concentrations of Hydrogen or Hydroxide ions and release these in water. Most life can only survive under a very narrow pH range and this is usually near neutral. Litmus paper and other indicators are used to measure pH, and both acids and bases change its color.