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W4.1 NITRIC ACID AND CALCIUM CARBONATE (1)
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Calcium carbonate (CaCO3) does not react with or dissolve in water. Watch the video to find out if it reacts with a solution of nitric acid (HNO3), then answer the questions:

Think for Yourself...

What tells you there is a chemical reaction?
Think of the substances that you know to be in the gas state at room temperature. Which four could be made using the atoms that are in the formulae of nitric acid and calcium carbonate?
Which one of these four substances is very soluble in water and would dissolve rather than bubble out?
When tested, the gas turns limewater milky. Which substance is it??
Must there be other new substances in solution? Look at the formulae and account for the atoms
How would you know when you had added enough calcium carbonate to react with all of the nitric acid?
How could you separate out the left over calcium carbonate?
How could you separate out any new substance that was dissolved?

Notes: see Teachers’ Guide
 
teachers’ guide w5


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w1: acids
w2: hydrochloric
w3: sulfuric
w4: nitric
w5: patterns


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