Practice Balancing Chemical Equations (4.1) - Chemical Reactions

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6 sample questions

Question 1.
Write the unbalanced equation for the reaction of hydrogen with oxygen to form water.
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Think about what the reactants are.
Question 2.
Why is it necessary to balance chemical equations?
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Consider what happens to atoms during reactions.
3Question 3.
What is the balanced form of the chemical equation H₂ + O₂ → H₂O?
- H₂ + O₂ → H₂O
- 2H₂ + O₂ → H₂O
- 2H₂ + O₂ → 2H₂O
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Check the number of atoms on each side.
4Question 4.
True or False: A balanced equation has different totals of atoms on the reactants and products sides.
- True
- False
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Think about what balancing means in equations.
Question 5.
Balance the following combustion reaction: C₅H₁₂ + O₂ → CO₂ + H₂O.
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Count and balance C, H, and O atoms systematically across the equation.
Question 6.
Consider the equation SO₂ + O₂ → SO₃. Is this equation balanced? What would be the balanced form?
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Start by balancing sulfur and proceed to oxygen atoms.

5 more questions in this section. Enroll free to practise them all.