Test Today

Good luck to everyone on the Stoichiometry test today. This unit is slightly easier than the last few, so don't stress too much, but know your stuff. The following link helped me study!

http://www.sciencegeek.net/Chemistry/taters/Unit4Stoichiometry.htm

Again, good luck to all.

Stoichiometry Lab Overview

Beautiful Lab!

Click here for a demonstration: https://m.youtube.com/watch?v=f2X_8ViaDo8

After completing the lab, it is clear that we used Fe (III) rather than Fe (II). We made 1.8849 grams of Cu with a 85.17% yield.

Extra help:

https://www.chem.tamu.edu/class/majors/tutorialnotefiles/stochiometryproblems.htm

http://tmlimitingreagents.weebly.com/percentage-yield-and-actual-yield-practice-problems.html

http://www.scienceforums.net/topic/15728-nails-in-copper-ii-chloride/

Chemical Stoichiometry

We did a lab today!

Included are pictures of our forming Cu and my awesome goggle forehead marks. 

Mass of jar: 74.8083 g

Mass of CuCl2: 4.0836 g

Mass of Fe: 7.7266 g

Limiting Reagents

1. Balance the chemical equation for the chemical reaction

2. Convert the given information into moles.

3. Use stoichiometry for each individual reactant to find the mass of product produced

4. The reacant that produces a larger amount of product is the limiting reagent. 

5. The reactant that produces a larger amount of product is the excess reagent

6. To find the amount of remaining excess reactant, subtract the mass of excess reagent consumed from the total mass of excess reagent given.

Extra problems:

http://www.chemistry.wustl.edu/~coursedev/Online%20tutorials/Plink/limreag/probsetlr.htm

LAB DAY 2!!

Lab day 2!!

At the end of the lab, our Fe was 6.4298 grams. So, 1.2968 grams of Fe reacted in the lab.

Fe(II) 1.2968gFe * 1molFe/55.85gFe * 1mol Cu/1molFe * 63.55gCu/1molCu =1.476gCu

Fe(III) 1.2968gFe* 1molFe/55.85gFe * 3molCu/2molFe * 63.55gCu/1molCu = 2.213gCu

Cramming?

I know there's a lot of people cramming for the test. If you need any help with oxidation rules, I found this to be really helpful when I was studying!!

http://www.chemguide.co.uk/inorganic/redox/oxidnstates.html

Reaction Overview

Studying for the test tomorrow, I thought it would be helpful to share a summary of reactions.

In a double replacement

It forms a solid

2 ionic compounds that are both aq

AB+CD->AD+BC

In Acid/Base

Form water

H+ +OH- as reactants

Bc+BOH->Bx+H2O

In Redox

Transfer of electrons

Single replacement

A+BC->AC+B

Combustion

Compound + O2 -> 

Synthesis

A+B->C

Decomposition

C->A+B

Extra help:

https://m.youtube.com/watch?v=lQ6FBA1HM3s

https://www.khanacademy.org/science/chemistry/oxidation-reduction/redox-oxidation-reduction/v/oxidizing-and-reducing-agents-1

http://www.masterorganicchemistry.com/2012/04/11/walkthrough-of-acid-base-reactions-1/

REDOX Reactions Lab

Yesterday we conducted a lab with reactions using metals and solutions.

Included  are pictures from the lab, showing the interesting reactions of metals when reacted with solutions. Many trials did not react, but those that did produced things such as bubbles and smoke.