Tuesday, January 26, 2010

Jan 25-26 Reaction Rates

Today in class we started by identifying different types of chemical reactions (synthesis, decomposition, single and double replacement. We then reviewed the hints to balancing chemical equations.

We then performed a lab that looked at the effect temperature has on the speed of a chemical reaction. We found that if we compared the reaction of an alka-seltzer tablet in cold and hot water, the hot water had a much faster reaction rate.

We then looked at the effect of surface area on reaction rates. We found that if we increased the surface area by crushing the object, the reaction would speed up. We then discussed the effect of concentration on reaction rates.

Remember--the test will be this friday--study guide is available online on my website (go to the tests and quizzes section).

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