Search results
31 gru 2023 · This article contains a set of fun experiments that teach kids the fun of chemistry and how to tell a chemical change from a physical change.
Use these free chemistry lesson plans, experiments, and activities to teach and explore chemical reactions with K-12 students. A chemical reaction occurs when two or more substances (reactants) are mixed together and result in one or more new substances (products).
Uncover the inner workings of reactions, mixtures, and chemical phenomena through exciting experiments.
The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second.
24 sty 2018 · Investigate how changes in concentration affect the rates of reactions by a method involving measuring the volume of a gas produced and a method involving a change in colour or turbidity. This should be an investigation involving developing a hypothesis.
Define catalyst. 1 point. A substance that alters the rate of reaction without being used up. A substance that makes the end point of reaction more obvious. A substance that slows down a reaction. Clear selection.
Rates of reaction. By Dorothy Warren and Sandrine Bouchelkia. Bookmark. Observe how the concentration of sodium thiosulfate solution affects its rate of reaction with hydrochloric acid. The value of experiencing live practical work cannot be overstated.
