Answers section

Related Topic: Organic Chemistry 1

Related Subtopic: Laboratory preparation of ethyne

Questions 3.3.3

1. Valencies of calcium and carbon are 2 and 4 respectively. Draw a possible open structure to show the bonding that would satisfy these valencies.
2. What does the use of sand suggest about the reaction between calcium carbide and water?
3. Suggest the role of sand in this experiment.
4. Explain why water should be added dropwise, and why the flask should be initially dry.
5. State and explain one safety precaution for the experimenter in this reaction.

Answers to Questions 3.3.3

Plate 3.3.3Answers to Questions 3.3.3

5. Avoid contact of calcium carbide with skin. It would burn the skin by reacting with water in the skin.