Answer is: the hydronium ion (H₃O⁺)concentration is greater than hydroxide ion (OH⁻)<span> concentration.
</span><span>Bases (more hydroxide ions than hydronium ions) turn red litmus paper blue and acids (more hydronium ions than hydroxide ions) turn blue
litmus paper red. </span><span>Acids and bases have opposite properties and have the ability to
neutralize each other. Acids taste sour, give sharp stinging pain
in a wound and react with metals to produce hydrogen gas.</span>
