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Student Name: ________________________ SNC 3E Unit #1 – Materials and Safety Date: ________________ Science Wise: Succeeding in Today’s World 2.1 Chemical Reactions Chapter Notes (pg.32-45) Chemical Change A __________________ _________________ occurs when the properties of the __________________, what you end up with, are different from the _________________, the starting substances. The following is an example of a chemical reaction: This type of change is called a ________________ _______________. A chemical change always involves ________________ a new ___________________. A chemical change may be observed during a chemical reaction when the following happens: (use figure 2.2a-e) 1. ________________________________________________ 2. ________________________________________________ 3. ________________________________________________ 4. ________________________________________________ 5. ________________________________________________ Chemical Test ___________________ _______________ are not only used to make new substances. They are also useful in __________________ ________________ ________________. The tests that are used to determine unknown substances are called ________________ __________. Chemical Test for… What to Do… Results… Oxygen gas Hydrogen gas Carbon Dioxide gas Water Vapour Page 1 of 3 Student Name: ________________________ SNC 3E Unit #1 – Materials and Safety Date: ________________ Science Wise: Succeeding in Today’s World 2.1 Chemical Reactions Chemical Rates of Reaction The ___________ of which a new substances forms is called the ___________ of __________________. Different chemical substances will produce _______________ at _________________ rates. Factor that affects rate of reaction Temperature What is the effect? Example Surface Area Concentration Catalyst Rates of Reaction and Their Consequences The factors that ________________ the rate of reaction can be either ________________ or _________________. Many industries use ________________ __________________ to produce new _____________ or to change existing products. For example, ________________ is a very important chemical is today’s society. It is used in the production of _________________, _______________, _____________ and ___________________ ________________. Ammonia made _____________________, uses the _______________ ______________. This process uses 2 factors that increase the rate of reaction: ___________ ___________________ and an _____________ ________________. Review and Apply 1. Burning leaves is considered what type of change? (chemical or physical change) Explain your answer. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ Page 2 of 3 Student Name: ________________________ SNC 3E Unit #1 – Materials and Safety Date: ________________ Science Wise: Succeeding in Today’s World 2.1 Chemical Reactions 2. When zinc is placed in hydrochloric acid, zinc chloride and hydrogen gas are produced. How would you test for hydrogen gas? _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ 3. Why do photographers store film and batteries in a refrigerator? (Think about rates of reactions) _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ 4. What are the potential dangers that have to do with grain elevators or coal mines? List the reasons and effects of the rate of reactions. _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ _____________________________________________________________ Page 3 of 3