Do acids have a negative charge?

Flexi Says:
Acids are ionic compounds that produce positively charged hydrogen ions H+ or hydronium ions H3O+ when dissolved in water. Acids taste sour and react with metals. Bases are ionic compounds that produce negatively charged hydroxide ions OH− when dissolved in water. Bases taste bitter and do not react with metals. Examples of acids are vinegar and battery acid. The acid in vinegar is weak enough to safely eat on a salad. The acid in a car battery is strong enough to eat through the skin. Acids have a pH of less than 7 and bases have a pH ranging from 7 to 14.