Science Gr 7
Unit 10: Matter
Name :
22/4/2019
Making carbon dioxide
Carbon dioxide is produced whenever an acid reacts with a carbonate.
This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually
used because they are cheap and easy to obtain.
Write the equation with words and symbol
…………………… + ………………………. → ………………….. + ……..………. + ………………….
CaCO3(s) + ………………(aq) → ………………(aq) + ………….. (g) + …………….
Carbon dioxide can be collected over water, as shown in the diagram.
Carbon dioxide is slightly soluble in water and denser than air, so another way to collect it is in a dry, upright
gas jar. As the carbon dioxide falls out of the delivery tube and into the gas jar, it pushes the less dense air out
of the top of the gas jar.
Answer follow Question :
1- Why bubbles appear in a bottle
of sparkling water when you
unscrew the lid ?
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Why many fire extinguishers
contain carbon dioxide gas?
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