Chemistry: Common Acids and Bases Chemistry Formula Guide

🧪 Common Acids and Bases in Chemistry

Acids and bases are fundamental concepts in chemistry. Understanding their formulas and properties is crucial. Here's a guide to some common acids and bases:

Acids

• Hydrochloric Acid (HCl): A strong acid found in gastric acid.
• Sulfuric Acid (H₂SO₄): A strong acid used in many industrial processes.
• Nitric Acid (HNO₃): A strong acid used in the production of fertilizers and explosives.
• Acetic Acid (CH₃COOH): A weak acid found in vinegar.
• Carbonic Acid (H₂CO₃): A weak acid formed when carbon dioxide dissolves in water.
• Phosphoric Acid (H₃PO₄): Used in fertilizers, detergents, and food additives.

Properties of Acids

• Taste sour. 🍋
• React with metals to produce hydrogen gas.
• Turn blue litmus paper red.
• Have a pH less than 7.
• Donate protons (H⁺) in solution.

Bases

• Sodium Hydroxide (NaOH): A strong base, also known as lye or caustic soda.
• Potassium Hydroxide (KOH): A strong base used in soap making.
• Ammonia (NH₃): A weak base used in cleaning products and fertilizers.
• Calcium Hydroxide (Ca(OH)₂): Also known as slaked lime, used in construction.
• Sodium Bicarbonate (NaHCO₃): A weak base, also known as baking soda.

Properties of Bases

• Taste bitter. ☕
• Feel slippery to the touch.
• Turn red litmus paper blue.
• Have a pH greater than 7.
• Accept protons (H⁺) in solution or donate hydroxide ions (OH⁻).

Neutralization Reaction

Acids and bases react with each other in a process called neutralization. The general equation is:

Acid + Base → Salt + Water

For example:

HCl + NaOH → NaCl + H₂O

pH Scale

The pH scale measures the acidity or basicity of a solution. It ranges from 0 to 14:

• pH < 7: Acidic
• pH = 7: Neutral
• pH > 7: Basic

Acid-Base Indicators

Acid-base indicators are substances that change color depending on the pH of the solution. Common indicators include:

• Litmus: Red in acid, blue in base.
• Phenolphthalein: Colorless in acid, pink in base.
• Methyl Orange: Red in acid, yellow in base.

🧮 Important Formulas

• pH = -log[H⁺]
• pOH = -log[OH⁻]
• pH + pOH = 14

Understanding these common acids and bases, along with their properties and formulas, is essential for grasping chemical reactions and processes. 👩‍🔬