3 Questions for 4/18/14

1.What tasks have you completed recently?
I have recently completed online homework for my chemistry class.

2.What have you learned recently?
I have learned how to create a net ionic equation.

3.What are you planning on doing next?
I plan to be able to organize myself better to increase my productivity, and do well on the unit 4 test, and complete a lab I was absent for in class.

Exploration – Compounds and Ions – 4/15/14

Following our reactions lab from monday, we did another lab this week. However, this one dealt with compounds and ions.

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For this lab, we needed to take two beakers and fill them with the same amount of D.I. water. Me and my partner chose to use 100mL of water. After this, we needed to add salt to a beaker, and sugar to the other. We needed to create compounds that appeared homogeneous, in that the salt and sugar were not visible.

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We then discussed as a group the properties of the compounds, and began to question how to test the ionization of the compounds.
We determined we could do this by using a “light bulb set-up” to determine if the compounds were ionically charged.

By doing this, we discovered that the salt-water compound was charged,while the sugar-water compound was not. We knew this because the salt-water compound conducted electricity, while the sugar-water compound did not.
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We learned that the salt-water compound was conductive because the conductive ions were separated by water, whereas the sugar-water compound had no ions. We explained this using a particle diagram.

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Exploration – Chemical Reactions Lab – 4/14/14

In class, we did a lab in which we were do multiple experiments, observe the major types of reactions, record these observations, and complete a balanced equation for each reaction.
Me and my partner were assigned the 4th and 7th experiments, which were…

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We followed lab procedures, and wore protective goggles and aprons to avoid chemical contact with ourselves.

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After performing each experiment, we recorded our observations…

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After this, we gathered up all our class data, and created equations for each reaction. We then balanced these and recorded the equations.

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Overall, this lab taught us how a reaction transfers into a chemical equation. This taught us in the sense that some reactions had different results than others. For example, Reactions 1 and 2 produced a single compound, whereas Reactions 3 and 4 only had a single reactant, but produced multiple products. This showed us that reactions can vary, and depending on reactants and procedure, can produce different outcomes and products.

3 Questions for 4/11/14

1.What tasks have you completed recently?
I have recently started unit 4 in chemistry.

2.What have you learned recently?
I have learned how to determine if a compound is ionically charged using electricity.

3.What are you planning on doing next?
I plan to be able to organize myself better to increase my productivity, and do well on the unit 4 test.

3 Questions for 4/4/14

1.What tasks have you completed recently?
I have recently completed unit 3 in chemistry.

2.What have you learned recently?
I have learned how to solve problems using Stoichiometry.

3.What are you planning on doing next?
I plan to be able to organize myself better to increase my productivity, as well as study for the ACT, and do well on the unit 3 test.

Exploration – These Guys VS Those Guys #2 – 4/1/14

In class, we have been conducting another set of “These Guys VS Those Guys” experiments. In these, we use the masses of two compounds to determine the amount of gas that is produced in the reaction of the two chemicals. We then use the amount of powder(one of the substances) and the amount of gas to determine the “gas-to-powder” ratio.
In our first test, we used baking powder and vinegar, massing our containers before we added substances, with the substances, and after the reaction.

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We then used our data to determine the mass of the gas produced, and recorded this along with the data from the other groups to make a scatter plot.

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Then, we used our points to find our linear regression, which most of us were close to. However, after using the molecular masses of the compounds to find the best fit line, we determined that there was a huge error in nearly all our calculations, or an error in experimentation. In the end, only three groups(not including ours) had feasible data.

In our second test, we used sodium bicarbonate and vinegar as our substances. We repeated the steps of the first test and recorded all our data.

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We then again used class data to create a scatter plot, and molecular mass to find the best fit line.

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Here, we see much of the data is close or below the line. However, our data(the smile face point) was well above due to spillage of substance during our reaction. We felt this took away the validity of our data.

In our final test, we used baking powder and H2SO4 as our substances. Again, we recorded all data before and after the reaction.

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With class data, we again made a scatter plot,  including our linear regression and the best fit line.

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In this test, nearly all class data is close to or on the best fit line. Our data(the smile face) came rather close to the best fit line, and with no error in calculation, and no known error in the experiment, we felt this data was valid.

In the end, we had gone through these experiments believing we were repeating what we already knew. However, it was revealed to us we were actually doing Stoichiomerty without even knowing! As our lessons lead into Stoichiometry, this is an important thing to know.

3 Questions for 3/28/14

1.What tasks have you completed recently?
I have recently completed chapter 5 in auto technology.

2.What have you learned recently?
I have learned how to determine the problems in a brake system by diagnosing symptoms.

3.What are you planning on doing next?
I plan to be able to organize myself better to increase my productivity, as well as study for the ACT.

This Guy ^^^