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Acid/Base Test
I will be honest, I did not study for this test at all. I had a complete brain fart on this test, too. I did very bad and had no clue how to find a pH or H+ concentration or use an ICE equation. I'm just glad the very hard sections are done and the class will become easier.
Titration II
We preformed another titration lab, but this time we only found the molarity of an unknown solution. The whole lab was basically the same, but we had no clue what the acid was. We needed to find out what was the molarity and mass of the base to find the info on the acid.
Titration Lab
In this lab, we used a base to find the molar mass of an acid. We put NaOH in a burett. In a flask we have multiple chemicals to help find the molarity of the NaOH. After we find the molarity, we mix the acid, which was vinegar, and the base to find the molarity of the base, which can then be used to find the molar mass.
pH of Solutions
When finding the pH of solutions, you must use a "log" function. By taking a simple negative log function, you can find either the pH or pOH. pH is relating to [H+] and pOH is relating to [OH-].
The hard part of this lesson was writing equilibrium equations. Your Kc will equal an [H3O+] multiplied by the product and all divided by the other reactant. The hardest part was finding the pH of an aqueous solution. Learn how to do it by this link here.
The hard part of this lesson was writing equilibrium equations. Your Kc will equal an [H3O+] multiplied by the product and all divided by the other reactant. The hardest part was finding the pH of an aqueous solution. Learn how to do it by this link here.
Arrhenius Reactions
Arrhenius reactions the product is always produce salt and water. The strengths of the parent acids and bases determine the strength of the salt. Check out this awesome video about Arrhenius Reactions here.
We also learned about Kw and how it is used to find the equilibrium statement of the autoionization of water. Kc = [H30+][OH-] = Kw. If you take the Kc constant and divide it by the Molarity, you can find the [H+] and [OH-]. This link also has some good info about the reaction here.
Also check out the link under the photo.
We also learned about Kw and how it is used to find the equilibrium statement of the autoionization of water. Kc = [H30+][OH-] = Kw. If you take the Kc constant and divide it by the Molarity, you can find the [H+] and [OH-]. This link also has some good info about the reaction here.
Also check out the link under the photo.
First Thoughts
By the very first lesson, I was already confused. I'm definitely going to have a hard time on this unit. To start off with, acids produce H+ ions and bases create OH- ions. For a good basic summary check out this link here.
The link under the picture also has some good information about the ph scale and acids/bases.
Murder Mystery
In this lab, we had to discover who killed Mrs. Scarlet and what she was killed with. She was either killed with Silver Nitrate or Potassium Iodide. We did some pre-calculations and found out that only the silver nitrate will create a precipitate. When we performed the experiment, we found that the reaction produced a precipitate and that told us that silver nitrate was the murder weapon. We then found the molarity to come to the conclusion that Mr. Green killed Mrs. Scarlet.
Weekly Quiz
We had a quiz and I did absolutely horrible. The only thing on the quiz I knew how to do was dilutions. I had no idea how to do molarity because I fell asleep during that lesson. I did some research to figure this lesson out. I found an awesome website that completely explained the lesson. Check it out here if you had trouble with this section.
Also check out the link under the video.
Dilutions
Today we covered a new topic called Dilutions, more specifically serial dilutions. Right away, I made a connection between the dilution equation to the equation for the conservation of momentum or inertia. Basically serial dilution is when a solution is continually mixed with water and over time, the amount of the original solution will decrease in the water. You should really check out this video over stock dilution here.
http://www.slideshare.net/sarah_jumali/serial-dilution
Also if you want to learn more about dilution, check out this link here.
We also preformed a lab dealing with dilutions. We placed food coloring in water then took that solution and mixed it with more water. Eventually, we could not see the red anymore in the solution, but the percentage of food coloring was so low.
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