Practice Keywords To Remember (9) - Chemical Reactions

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6 sample questions

Question 1.
What are substances that go through chemical changes called?
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Think about what starts a chemical reaction.
Question 2.
What do we call new substances formed in a chemical reaction?
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They are the end result of a reaction.
3Question 3.
What are reactants?
- Substances formed from a reaction
- Substances that undergo change
- Substances that do not react
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Think about what you begin with in a chemical process.
4Question 4.
True or False: A balanced equation has different numbers of atoms on each side.
- True
- False
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Consider the principle of mass conservation in reactions.
Question 5.
Given the reaction between iron and oxygen in moist air, write the balanced equation, and describe the effects of environmental factors on the rate of rusting.
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Consider how the environment plays a role in chemical reactions.
Question 6.
Propose a method to demonstrate the formation of a precipitate in a lab setting, and identify the chemicals needed.
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Think of common copper sulfate and the right counteracting solution that leads to insolubility.

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