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Acid Explosion

Acid Explosion. Summary. The litmus test. strong acid. weak acid. neutral. weak alkali. strong alkali. What is universal indicator?. Universal indicator has a range of colours that show how weak or strong the acid or alkali is. What is the colour for a weak acid?.

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Acid Explosion

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  1. Acid Explosion Summary

  2. The litmus test

  3. strong acid weak acid neutral weak alkali strong alkali What is universal indicator? Universal indicator has a range of colours that show how weak or strong the acid or alkali is. What is the colour for a weak acid? What is the colour for a strong alkali? Universal indicator is made from a mixture of indicators. Why do you think it is more useful than litmus?

  4. Mixing acids and alkalis

  5. What is neutralization? The chemical reaction between an acid and an alkali is called neutralization. What is the pH value of the mixture of salt and water? +  acid alkali salt + water The mixture of salt and water is neutral, so its pH is 7. The chemical reaction between an acid and an alkali can be written as: + acid alkali  salt + water

  6. Making salts The salt produced by a neutralization reaction depends on the acid and the alkali used. Sodium chloride is produced by the reaction between hydrochloric acid and sodium hydroxide. hydrochloric acid sodium hydroxide sodium chloride + +  water Which acid and which alkali would be needed to make the salt potassium chloride? hydrochloric acid potassium hydroxide potassiumchloride + +  water

  7. Naming salts • When an alkali reacts with hydrochloric acid, the salt produced is a chloride. • When an alkali reacts with sulfuric acid, the salt produced is a sulfate. • When an alkali reacts with nitric acid, the salt produced is a nitrate. • Which acid would be needed to make these salts? • copper nitrate • magnesium chloride • sodium sulfate

  8. Neutralizing stings Bee stings are acidic. Wasp stings are alkaline. Which safe household substances could you use to treat a bee sting? Which safe household substances could you use to treat a wasp sting?

  9. Indigestion remedies The acid in your stomach that helps you break down your food is called hydrochloric acid. It has a pH of between 1 and2. Indigestion and heartburn are caused by an excess of acid in your stomach. Indigestion remedies such as Milk of Magnesia contain antacids, like magnesium oxide and calcium carbonate. What do you think antacids do to the acid in your stomach?

  10. Acid and carbonate When a carbonate reacts with an acid, it gives off carbon dioxide gas. How could you test the gas given off, to confirm that it is carbon dioxide? What would you observe in this test? carbon dioxide limewater

  11. Acid and metal Acids also react with metals to make a gas. When an acid reacts with a metal, the gas produced makes a lighted splint go pop. What is this gas? A salt is also produced during the reaction. What is the name of the salt that will be produced by the reaction of hydrochloric acid with calcium? hydrochloric acid calcium chloride + + calcium  hydrogen

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