Testing for Carbon Dioxide with Lime Water

The video tutorial demonstrates a method to test for carbon dioxide (CO2) gas by bubbling it through lime water, an aqueous solution of calcium hydroxide. The reaction between CO2 and calcium hydroxide forms a milky white precipitate of calcium carbonate, indicating the presence of CO2. The video provides a step-by-step demonstration of this chemical reaction, highlighting the change from a clear solution to a milky white one, which confirms the presence of CO2. Dr. B concludes the tutorial by summarizing the test and thanking viewers.

What is the purpose of bubbling carbon dioxide through lime water?

• To test for the presence of oxygen

• To test for the presence of hydrogen

• To test for the presence of nitrogen

• To test for the presence of carbon dioxide

What is lime water chemically known as?

• Sodium hydroxide

• Calcium carbonate

• Potassium hydroxide

• Calcium hydroxide

What is formed when carbon dioxide reacts with calcium hydroxide?

• Calcium oxide

• Calcium carbonate

• Calcium chloride

• Calcium sulfate

What indicates a positive test for carbon dioxide in lime water?

• A clear solution

• A blue precipitate

• A green solution

• A milky white precipitate

Who is conducting the test for carbon dioxide in the video?

• Dr. B

• Dr. A

• Dr. D

• Dr. C