Chemical change

• There are three acids commonly used in chemistry: hydrochloric acid, sulfuric acid, and nitric acid.
• All acids contain hydrogen.
• The reactivity series of metals shows that all metals are more reactive than hydrogen, meaning they can displace hydrogen from acids.
• When acids react with metals, they always produce two products: a salt and hydrogen gas.
• The salt produced in an acid-metal reaction depends on the acid used and the metal reacting with it.
• Hydrochloric acid produces salts that end in the word chloride, while sulfuric acid produces salts that end in the word sulfate.
• Magnesium, zinc, and iron are metals that can be used in acid-metal reactions.
• Magnesium reacts rapidly with acids, as it is more reactive than hydrogen.
• Zinc is more reactive than hydrogen, so it can displace hydrogen from acids, but it reacts slowly.
• Iron is only slightly more reactive than hydrogen, so it will react slowly with acids.