Solution To Dilutions

We started the new unit, Aqueous Solutions, recently and the first formula we learned about was M1V1=M2V2. It is a concept that is pretty easy to grasp once you get the algebra down and are able to identify which part of the problem coincides with which part of the formula. So far, the unit is going well and I am excited to have another math-based unit.

Solution to Dilution Video

More Help:

Dilution Practice Problems

Dilution Notes and Practice

¡Copper (II) Chloride Lab Day 1 & 2!

Day 1:

We weighed all of our materials on the first day, and put our nail on the copper (II) chloride. The nail turned red and it was pretty cool.

The nail turned red as soon as it hit the CuCl2

Day 2:

After letting the nail soak overnight, we found that the solution turned green and a bunch of poop-looking copper was a product from the reaction. We then had to get rid of the nail and all the liquid by siphoning and pour water into the jar with the copper and siphoned off the water as well. The copper is left in the jar for the weekend and now we wait.

The "swamp water" after the reaction overnight

       

The nail after it reacted with the CuCl2

After siphoning the water from the product

Percent Yield

We learned the final part of our stoichiometry unit today: percent yield. Similar to the other part of the unit, it is very math driven, and is not difficult once you learn how to set the problems up. Up next is three day lab and a unit test before final. Almost there!!!

Percent Yield & Limiting Reagents

El Quiz de Stoichiometry. ¡Ay Caramba!

The quiz today, although it consisted of only diez preguntas took me the whole class hour to finish. There were a few questions that I was not quite confident in how to set them up initially, but after thinking about it, I figured out how to do it. Each problem took me about cinco minutos to finish, and that proved to take me up to the end of the class hour to complete. Some of the problems were a little more involved and took more application, and some were just like the practice problems we did en clase. I'm really excited for this unit though, I really like the math application combined with the chemical reactions, and it has not been as challenging this time around because of how much practice I got from the chemical composition unit!

Links de Estudiar:
Práctica
Más Práctica
Notas

Home Stretch

We started the last unit of the quarter before finals last week. It is stoichiometry and it's builds upon what we learned in the chemical composition and chemical reactions units. As of now, I can understand what is going on because it is very similar to what we learned in chemical composition, but I am sure it will get more challenging as we progress further. So far we have learned how to predict the mass of the product or reactant, and how to identify and find the mass of the limiting reagent.

Bozeman: Finding Mass of Reactant or Product Using Stoichiometry

Bozeman: Identifying and Finding Mass of Limiting Reagent

Test Day ¡Yikes!

Today we had a chemistry test! It was fairly difficult, but I after reviewing some of the questions, I came to a consensus as to what the answer is. I'm a little nervous to see my grade since it's so late  in the semester, but I am fairly confident in my test. There were some questions that were iffy to me. Also, it didn't take as long to finish the test as it did for the chemical composition test, so that relieved some stress. Overall, this test was challenging but not as stressful as last test.

Metals Lab

The Metals Lab was fairly simple to complete. We had to place various aqueous solutions in small amounts of metals and record the reactions that took place. This lab was more interesting than the last in that some of the reactions bubbled, fizzed, and had gas come out. Overall, calcium turned out to be the most reactive metal, and lead was the least reactive.

The metals we worked with in the lab (zinc, lead, tin, magnesium, copper, calcium)

The products of the reactions

The products of the second round of reactions