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Set up the apparatus as shown in Chapter 2, Activity 2.5.n Take a spatula full of sodium carbonate in a test tube and add 2 mL of diluteethanoic acid.n What do you observe?n Pass the gas produced through freshly prepared lime-water. What do you observe?n Can the gas produced by the reaction between ethanoic acid and sodium carbonate beidentified by this test?n Repeat this Activity with sodium hydrogencarbonate instead of sodium carbonate.

Question

Set up the apparatus as shown in Chapter 2, Activity 2.5.n Take a spatula full of sodium carbonate in a test tube and add 2 mL of diluteethanoic acid.n What do you observe?n Pass the gas produced through freshly prepared lime-water. What do you observe?n Can the gas produced by the reaction between ethanoic acid and sodium carbonate beidentified by this test?n Repeat this Activity with sodium hydrogencarbonate instead of sodium carbonate.

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Solution

  1. Set up the apparatus as shown in Chapter 2, Activity 2.5. This typically involves arranging the test tubes, beakers, and other necessary equipment in a specific way.

  2. Take a spatula full of sodium carbonate. Sodium carbonate is a white, crystalline solid commonly found in powder form. It's also known as soda ash or washing soda.

  3. Add 2 mL of dilute ethanoic acid to the test tube containing sodium carbonate. Ethanoic acid, also known as acetic acid, is a colorless liquid organic compound with a distinctive sour taste and pungent smell.

  4. Observe the reaction. You should see effervescence or bubbling in the test tube. This is due to the production of carbon dioxide gas from the reaction between sodium carbonate and ethanoic acid.

  5. Pass the gas produced through freshly prepared lime-water. Lime-water is a solution of calcium hydroxide in water.

  6. Observe the reaction. The lime-water should turn milky. This is a positive test for carbon dioxide, as carbon dioxide reacts with calcium hydroxide to form calcium carbonate, which is insoluble and appears as a milky precipitate.

  7. Yes, the gas produced by the reaction between ethanoic acid and sodium carbonate can be identified by this test. The test is a standard one for the presence of carbon dioxide.

  8. Repeat this activity with sodium hydrogencarbonate instead of sodium carbonate. Sodium hydrogencarbonate, also known as sodium bicarbonate or baking soda, will react in a similar way with ethanoic acid, producing carbon dioxide gas that can be identified by passing it through lime-water.

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