Practice Chemical Reaction in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A process where substances (reactants) are transformed into different substances (products).
Old bonds break, new bonds form. You end up with different stuff than you started with.
Example 1
easyIdentify the reactants and products in the following reaction: 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}.
Example 2
mediumList four signs that a chemical reaction has occurred, and give an example of each.
Example 3
easyIs dissolving sugar in water a chemical reaction? Explain.
Example 4
easyA student heats sugar until it turns brown and gives off a new smell. Is this a chemical reaction or just a physical change? Explain.