Lesson Worksheet: The Sources and Preparation of Carbon Dioxide Science
In this worksheet, we will practice describing the sources of carbon dioxide gas, preparing, and testing for it.
Q1:
What is produced when lemon juice is added to sodium bicarbonate (baking soda)?
- ACarbon dioxide gas
- BOxygen gas
- CCarbon
Q2:
When carbon dioxide gas reacts with limewater, a white precipitate is formed. What is a precipitate?
- AA substance whose quantity and structure do not change during a chemical reaction
- BCarbon dioxide in the solid state
- CAn insoluble solid that is produced in a solution
Q3:
A class tested whether combustion produces carbon dioxide. They followed the method below:
- Light a candle and place it in a glass cylinder.
- Put a glass cover over the cylinder.
- After 5 minutes, remove the glass cover and pour limewater into the cylinder.
- Put the glass cover back on the cylinder.
Which of the following observations would show that carbon dioxide gas was produced by the burning candle?
- AThe limewater turned turbid.
- BThe limewater stayed clear.
- CThe candle flame reappeared.
Q4:
Name the precipitate formed when limewater reacts with carbon dioxide gas.
- ACalcium hydroxide
- BCarbon
- CCalcium carbonate
Q5:
Fill in the blanks: When carbon dioxide gas is passed through (calcium hydroxide), the liquid turns .
- Aclear limewater, turbid
- Blemon juice, clear
- Clemon juice, turbid
- Dcloudy limewater, clear
Q6:
The apparatus below was set up by a class to prepare carbon dioxide gas.
Should the class add water to the cylinder before the reaction begins?
- AYes
- BNo
Why?
- ABecause carbon dioxide gas is heavier than water
- BBecause carbon dioxide dissolves easily in water, so it cannot be collected easily
- CBecause carbon dioxide does not dissolve easily in water, so it can be collected by displacement
Q7:
A class set up an experiment to prepare gaseous carbon dioxide.
Fill in the blanks: Because carbon dioxide gas is than air, it is collected by displacement of air.
- Alighter, upward
- Bheavier, upward
- Clighter, downward
- Dheavier, downward
Q8:
A class wanted to test whether plants produce carbon dioxide gas. They put a tube between a jar of germinating seeds and a jar containing clear limewater.
The next day, the limewater had turned cloudy. Fill in the blanks: This experiment showed that plants produce gas. This happens in a process called .
- Acarbon dioxide, photosynthesis
- Boxygen, photosynthesis
- Ccarbon dioxide, respiration
- Doxygen, respiration
Q9:
A class set up an experiment to prepare carbon dioxide from calcium carbonate.
In what state of matter is the carbon dioxide that forms?
- AGaseous state
- BSolid state
- CLiquid state
Q10:
Fill in the blank: The reaction between limewater and carbon dioxide gas forms a white precipitate called .
- Ahydrochloric acid
- Bcalcium hydroxide
- Ccalcium carbonate
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