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laboratory instruction

DAVID LICATA's picture

Mass of a Reaction Product

Wed, 10/29/2014 - 21:41 -- DAVID LICATA
Sodium carbonate reacts with hydrochloric acid producing bubbles

Students combine sodium carbonate and hydrochloric acid generating carbon dioxide gas which is allowed to escape. They measure the actual yield of carbon dioxide produced (missing mass), calculate the theoretical yield using stoichiometry, and then the percent yield. Students understand that 100% yield is the most appropriate answer (based on the Law of Conservation of Mass), so after considering the meaning of significant figures and the uncertainty of their measurements they are asked to decide if they did (or did not) get an answer that might indicate the validity of the Law.

Time required: 

One 50-minute period to perform the lab. One additional period to perform the calculations (optional). Often more able students will have time to begin some calculations at the end of the lab experiment.

Michael Morgan's picture

Complex Ions Lab

Wed, 03/19/2014 - 13:43 -- Michael Morgan
preview complex ions lab

This laboratory exercise accompanies the article "A guided group inquiry lesson on coordination compounds and complex ions". The laboratory serves as part of an extended exercise on the chemistry topic of coordination compounds and complex ions. The entire lesson as described in the article also exposes students to how chemical research is conducted and the conflicts and uncertainties that lead to new theories and discoveries.

Time required: 

Five class periods for entire lesson.

Deanna Cullen's picture

Types of Chemical Reactions

Wed, 01/15/2014 - 17:23 -- Deanna Cullen

I expect that most high school chemistry teachers assign some type of laboratory related to types of chemical reactions including synthesis, decomposition, single replacement and double replacement reactions. I have used several published versions, but I am sharing my modifications.

Time required: 

20 minutes prep, 40 minutes laboratory, 15-20 minutes discussion

Homogeneous Solutions using PhET Interactive Simulations and labs

Mon, 09/16/2013 - 15:19 -- Trish Loeblein

This is a series of experiments, PhET Interactive Simulation activities, and clicker questions to relate macroscopic and molecular representations of homogenenous solutions. Graphing skills are also used.

Time required: 

This is a combination of activities that will take several class periods or a few class periods and homework if students have computer access outside of classtime. 

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