What do all acids have in common?

All acids have these characteristics in common:

• Are sour in taste
• Have a pH value of less than 7
• Have hydrogen in their chemical composition
• Release Hydrogen ions (H+) when dissolved in water
• Release Hydrogen gas (H2) on reacting with metals
• Conduct electricity when dissolved in water
• React with bases
• Form salt and water on reaction with a base
• Are good dehydrating agents
• Are electrolytes and good conductors of electricity
• Turn blue litmus red
• Remain colorless when placed in phenolphthalein