Characteristics of Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Characteristics of Chemical Reactions starts at 7 and continues till grade 12.
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Describe the difference between a physical change and a chemical change.
Describe what is meant by 'evolution of gas' in a chemical reaction.
Describe what is meant by the term 'precipitate' in the context of chemical reactions.
During a chemical reaction, the total mass of reactants and products remains constant. This is an example of which law?
Explain why a change in odor can be considered evidence of a chemical reaction.
Explain why dissolving salt in water is not considered a chemical reaction.
Explain why the burning of a candle is considered a chemical reaction.
Explain why the change in temperature is considered a characteristic of a chemical reaction.
Explain why the rusting of iron is considered a chemical reaction.
State one example of a chemical reaction that involves the evolution of heat.
State whether the following is a chemical or physical change: Boiling of water.
State whether the following is a chemical or physical change: Cutting a piece of paper.
When a solution of lead(II) nitrate is mixed with potassium iodide, a yellow precipitate forms. What does this indicate?
When dilute hydrochloric acid is added to zinc granules, bubbles are observed. What do these bubbles indicate?
When two clear solutions are mixed and a yellow solid forms, what characteristic of chemical reactions does this demonstrate?
When vinegar is added to baking soda, a fizzing sound is heard and bubbles are seen. What does this indicate about the reaction?
