3 Acid reactions.

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Reactions of metals with acid

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Presentation transcript:

3 Acid reactions

Practice Identify the acids, bases, metals and carbonates in the following examples: HCl ____________________ Ca____________________ HF____________________ RbOH____________________ Fe2(CO3)3____________________ Ca(OH)2____________________ HNO3____________________

Acid and Metals

Acids and metals Acids can corrode metals, Usually breaking them down into a salt and hydrogen gas. The general equation for the reaction between an acid and a metal is: Acid + metal  a salt + hydrogen gas Important Note: Hydrogen Gas – H2 Salt – Any compound formed by a metal taking the place of the hydrogen in an acid. Practical: An example of this type of reaction is magnesium (metal) and hydrochloric acid

Acid reactions experiment Reaction of an acid with a reactive metal

Word and Chemical Problems 1 1. Hydrochloric acid (HCl) + magnesium metal (Mg) 2. Sulfuric Acid (H2SO4) and Magnesium metal (Mg)

Word and Chemical Problems 2 Nitric Acid (HNO3) and Zinc Metal (Zn) Sulfuric Acid (H2SO4) and Sodium Metal (Na)

Your Turn Acid Reactions Booklet Complete Acid Reactions Worksheet 2 in your booklet

Acids And Carbonates

Acids and carbonates Acids react with carbonates to produce carbon dioxide (CO2) as well as salt and water. The general formula is: Acid + carbonate  a salt + water + carbon dioxide Note: A Carbonate is CO3 2- An example of this type of reaction is calcium carbonate and hydrochloric acid: Hydrochloric acid + calcium carbonate  calcium chloride + water + carbon dioxide

Acid reactions experiment Vinegar (ethanoic acid) + Baking Soda (Sodium Hydrogen Carbonate)  Sodium Acetate + Water + Carbon Dioxide CH3COOH + NaHCO3 → NaCH3COO + H2O + CO2 2 heaping teaspoons of Baking Soda 60 mls of vinegar 600 ml coke bottle Rubber stopper to fit lid

Acid reactions experiment Reaction of an acid with a carbonate

Word and Chemical Problems 1 Sodium Hydrogencarbonate + Sulphuric Acid  Sodium Carbonate + Sulphuric Acid 

Word and Chemical Problems 2 Iron (III) Carbonate + Carbonic Acid  Calcium Carbonate + Nitric Acid 

Your Turn Acid Reactions Booklet Complete Worksheet 3 – Acid + Metal Carbonate Reaction Note: Refer to the “Acids You Need to know…” at the back of your booklet.

Acid and bases Neutralisation

Acids and bases Acids and bases neutralise each other when mixed. They change each other into harmless substances such as water and a salt. Neutralisation reactions take the form: Acid + base  a salt + water An example of this type of reaction is: Sulfuric acid + sodium hydroxide  sodium sulfate + water

Acid reactions experiment Reaction of an acid and a base

Heartburn www.youtube.com/watch?v=3j2JbRUfpBo Heartburn is caused by HCl from your stomach risiing into your esophagus. Antacid tablets contain bases such as Mg(OH)2 or Al(OH)3 that neutralise the acid and bring relief.

Word and Chemical Problems 1 Aluminium Hydroxide + Hydrochloric Acid  Aluminium Chloride + Water Potassium Oxide + Nitric Acid  Potassium Nitrate + Water

Word and Chemical Problems 2 Iron (III) Oxide + Sulphuric Acid  Copper (II) Oxide + Phosphoric Acid 

Your Turn Acid Reactions Booklet Complete Worksheet 4 – Acid + Base Reactions (pg. 11-12) Note: Refer to the “Acids You Need to know…” at the back of your booklet.

Acid Rain

Identify – Clickview: http://online. clickview. com Causes of Acid Rain Effects of Acid Rain Measures to control Acid Rain