Everyday Acids and Bases

Vinegar (acetic acid) dissolves mineral deposits. Citric acid in lemon juice prevents fruit from browning by slowing oxidation. Aspirin is acetylsalicylic acid. Your stomach produces hydrochloric acid (pH ~1.5) to break down food and kill bacteria.

On the base side, soap is a base that emulsifies oils. Bleach (sodium hypochlorite) is a strong base that kills microorganisms. Baking soda neutralizes acids in cooking and cleaning. Antacids like calcium carbonate are bases that neutralize excess stomach acid.