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 in which one or more substances (reactants) are transformed into entirely different substances (products) through the breaking and forming of chemical bonds, accompanied.
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.