In this assignment you will view several movies showing a chemical reaction. Each movie has several questions designed to focus your attention on concepts to be discussed in lecture. Your complete responses will help me customize my lecture over this material.

Important do not press the enter key or the Return key while you are answering these questions. Your Browser will interpret either key the same as clicking the mouse on the Submit button. So BE CAREFUL!

NOTE: If the video does not play you will need to download the QuickTime Player Plug-in or the QuickTime Player for Windows Plug-in from the Apple web site. If you are using a modem connection from home that is not DSL or CableModem the download times required to view the movies will be long. The movies range in size from 2 Megs to 6 Megs. The movie on this page is about 6 Megs. The movies on the following page are smaller.

Name

Lecture Section:

View the movie on the right and answer Questions 1 - 5:

1. Identify the chemical species present in the solution poured into the beaker on the left in the movie.

2. Identify the chemical species present in the solution poured into the beaker on the right in the movie.

3. What evidence is there for a chemical reaction when the two solutions are mixed?

4. Given the fact that soluble ionic compounds exist in solution in the form of their component ions and insoluble compounds do not, which of the following species mostly likely accounts for your observation(s) in Question 3 above. Please choose only ONE of the five products.

Product 1 : Fe(SCN)3(aq)

Product 2 : Fe(SCN)3(s)

Product 3 : KNO3(aq)

Product 4 : KNO3(s)

Product 5 : FeSCN2+(aq)

Briefly, explain how you arrived at your answer. Also explain, why you eliminated the other choices.

5. Write the balanced net ionic equation that represents the chemical reaction between Fe(NO3)3(aq) and KSCN(aq). Identify the color of each of the species in the net ionic equation.

net ionic equation
+
--->

color

 

 

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