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Acids & Metals

Acids & Metals. D. CROWLEY, 2008. Acids & Metals. To know what happens when acids and metals react, and how to test for hydrogen. Reversible. Reaction. Irreversible. Irreversible. Look at the following reactions… Are they reversible or irreversible?. Reversible. Irreversible.

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Acids & Metals

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  1. Acids & Metals D. CROWLEY, 2008

  2. Acids & Metals • To know what happens when acids and metals react, and how to test for hydrogen

  3. Reversible Reaction Irreversible Irreversible • Look at the following reactions… • Are they reversible or irreversible? Reversible Irreversible Irreversible Irreversible Reversible Irreversible Irreversible Irreversible Reversible Irreversible

  4. Experiment • Your first experiment is to find out what happens when we add a piece of metal to acid • Add a small amount of acid into a boiling tube, and then drop one piece of metal into it • Repeat this for the different metals • Record your observation of what happens when we add the different metals into the acid

  5. Reactions

  6. Gas • What have you noticed when we add the metal to the acid? • The fizzing / bubbling indicates a gas is coming off – but what gas? There are 3 tests we can do to find out what gas it is: - • If it is carbon dioxide it will put out a lit splint / turn limewater cloudy when it is bubbled through • If it is oxygen, it will relight a glowing splint • If it is hydrogen, it will ignite with a squeaky pop

  7. Acid + Metal • Many metals react with acids – producing the gas hydrogen • A burning splint is the test for this, producing a squeaky popwhen it ignites hydrogen burning splint magnesium + acid

  8. Results • Finally, in your books write down which of the metals was the most reactive, and which was the least reactive • Explain how you came to your decision • Most reactive was the metal which fizzed / bubbled the most (released the most hydrogen), such as magnesium • The least reactive was the metal which did the least, such as copper

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