C6 - prep of carbon dioxide , hydrogen oxygen

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1
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<p>prep of carbon dioxide</p>

prep of carbon dioxide

  1. Carefully place the calcium carbonate into the conical flask.

  2. Collect 50 cm3 of hydrochloric acid in a small beaker.

  3. Connect the delivery tube and thistle funnel to the conical flask with the delivery tube in a basin of water.

  4. Have three gas jars/test tubes filled with water also inverted in the basin of water.

  5. Carefully pour the hydrochloric acid into the thistle funnel, wait 5 s then carefully place the first water filled gas jar/test tube over the end of the delivery tube. Allow the gas jar/test tube to fill with gas (when all of the water has been displaced).

  6. Leave the gas jar/test tube inverted in the water to retain the gas.

  7. Repeat step 5 until three gas jars/test tubes of gas have been collected.

  8. Remove each gas jars/test tube from the water as required for the following tests.

<ol><li><p>Carefully place the calcium carbonate into the conical flask.</p></li><li><p>Collect 50 cm<sup>3</sup> of hydrochloric acid in a small beaker.</p></li><li><p>Connect the delivery tube and thistle funnel to the conical flask with the delivery tube in a basin of water.</p></li><li><p>Have three gas jars/test tubes filled with water also inverted in the basin of water.</p></li><li><p>Carefully pour the hydrochloric acid into the thistle funnel, wait 5 s then carefully place the first water filled gas jar/test tube over the end of the delivery tube. Allow the gas jar/test tube to fill with gas (when all of the water has been displaced).</p></li><li><p>Leave the gas jar/test tube inverted in the water to retain the gas.</p></li><li><p>Repeat step 5 until three gas jars/test tubes of gas have been collected.</p></li><li><p>Remove each gas jars/test tube from the water as required for the following tests.</p></li></ol><p></p>
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test for carbon dioxide

  1. To the first test tube insert a lit splint – flame is extinguished

  2. To the second test tube add 1 cm3 of limewater, stopper and shake – turns milk or cloudy white

  3. record your observations To the third gas jar/test tube add 5 drops of universal indicator, stopper and shake . Add a little deionised water if no change observed and shake again. Acidic so colour will change to be yellow or orange

3
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prep for hydrogen

The same method is used as for carbon dioxide except zinc (or sometimes magnesium ribbon) is used in place of calcium carbonate. Collect 3 gas jars/test tubes of hydrogen gas in the same way.

4
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testing the gas

lit splint squeaky pop

5
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<p>prep for oxygen</p>

prep for oxygen

same but with manganese (IV) oxide and 50cm3 of hydrogen peroxide

<p>same but with manganese (IV) oxide and 50cm<sup>3</sup> of hydrogen peroxide</p>
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test for oxygen

glowing splint relights