Andrew+Mc

1.) The difference between a concentrated solution and a dilute solution is that in a concentrated solution there is more solute than solvent. Dilute contains more solvent than solute. 2.) In a strong acid solution the acid dissolves completely. In the weak acid there is a weak base so most of the acid isn't dissolved. 3.) [] this website shows the combonations of the acids. (concentration and dilute)

Wiki Assignment 9: Concentrated vs. Dilute and Strong vs Weak. Answer the following questions: 1. What is the difference between a concentrated solution and a dilute solution? 2. What is the difference between a strong vs weak acid solution? 3. Come up with some sort of representation of the following combinations: A concentrated solution of a strong acid, a concentrated solution of a weak acid, a dilute solution of a strong acid and a dilute solution of a weak acid. This could be drawn in a word document and uploaded to the wiki (instructions for uploading files to the wiki will be posted

1.) The reactants and products and reacting at the same rate.(At the same time) Even though they are the same rate, the forward and reverse reactions are always occuring. 2.)The equation is: the concentration of products divided by the concentrations of reactants. My examples are on this site: [] 3.)Both heterogeneous and homogeneuos equilibria are shown on the site: []

Wiki Assignment 8: Equilibrium 2 Answer the following questions about equilibrium 1. Explain why, once a chemical system has reached equilibrium, the concentrations of all reacts and products remain constant with time. Why does this constancy of concentration not contradict our picture of equilibrium as being dynamic? 2. Describe how we write the equilibrium expression for a reaction. Give three examples of balanced chemical equations and the corresponding expressions for their equilibrium constants. 3. Give balanced chemical equations and write the corresponding equilibrium constant expressions for examples of both homogeneous and heterogeneous equilibria.

Equilibrium can be explained the balancing of two processes, in which one is the opposite of the other. An example that I found out would be a fountain that you see in ponds, at golf courses, or even fondue fountains. In a fountain at a mall the water gets flowing upward towards the top of the structure and it flows downward back into the cup or bowl that the water sits in without it draining. This process gets repeated again as it flows to the top of the fountain. It is important that none of the water is taken out. This proves the chemical equilibrium that in a dynamic state the concentrations of all the reactants and products remain constant.The water being pumped and sucked also needs to be constant.

Assignment 7: Equilibrium

Come up with your own example of an equilibrium system and relate it to chemical equilibrium. Make sure to thoroughly explain how your example matches with chemical equilibrium.

Concentration:[|Elephant Toothpaste] In this experiment, the chemist mixes hydrogen peroxide and sodium iodide. He firsts mixes 3% hydrogen peroxide and sodium iodide and it reacts slow and it builds up to overflow the flask. Then he mixes 30% hydrogen peroxide with sodium iodide and this reaction is much faster and overflows the flask in a matter of a second. He explains that the 30% hydrogen peroxide will react faster because with the higher concentration that means more molecules are bumping into the sodium iodide molecules. The reaction rate was higher because there were more reactions taking place.

Temperature: [|Glowstick] In this experiment the chemist has three jars and three glowsticks. He has a jars of hot water, cold water and no water. He places one glowstick in each jar. Over a period of time there is a change in the glowsticks. The one that was in the hot water was very bright compared to the other two. The one in the cold water was almost not glowing anymore, and the one in no water was just at normal glowing rate. The chemist explains that the one in hot water was the brightest because the water was high in temperature causing the reaction in the glow stick to happen faster. The one in the cold water was almost out because the reaction rate was slowed down by the cold temperature of the water, causing the molecules to move slower. The room temperature molecules in the stick were still moving but not as fast or slow as the other two. The chemist also explains that this is why we put spaghetti noodles in hot water, so that they becomes softer quicker, and that we could soften them in cold water but it would take a very long time.

Catlayst: [] In this experiment, salt is mixed in with room temperature water and then hot water is mixed in with another batch of salt. The salt is dissolved quicker in the hot water, and the water was not consumed by the reaction, making it a catalyst. The hot water increases the rate of reaction.

Surface Area: [] The chemist puts some powder on a ceramic plate and with a bunsen burner tries burning the powder but it does not burn. But when he sifts it over the bunsen burner the surface area around each particle and the oxygen concentration around each particle increases also. This can cause dust elevator explosions also.

In this experiment Wiki Assignment 6: Reaction rates Find an example demonstrating how each of the following affects the reaction rate and explain the effect using collision theory: Concentration Temperature Catalyst Surface Area You many NOT use any of the examples we talked about in class. Videos or written descriptions are fine to use, but make sure to cite where you got your information.

Assignment 5

1.Immiscibilty: An oil spill can affect many of the organisms living in the ocean but luckily there is a way to clean them up. One process of cleaning up oil spills is "containment and skimming", in this process they have a long skirt that keeps the oil from spreading and then they use boats to skim/ suck the oil from the water. Another process is "sponging", where sponges absorb the oil from the water. A last resort is to burn the water but the oil can release toxic smoke, so it would not be ideal by the coasts.

2. Solubility versus Rate of Dissolution Solubility- Solubility is the quantity of a particular substance that can dissolve in a particular solvent (yielding a saturated solution) Rate of Dissolution- the amount of time the breaking up of particles takes. An example can be seen with food coloring and how long it takes for the coloring to spread evenly to spread throughout the water.

Using Kool-Aid as the example-

Temperature- If the temperature of the water is raised the faster the molecules move in the water, so therefore the kool-aid powder would dissolve faster because of the excitement within the water.

Stirring- Stirring the kool-aid powder would speed up the process because the powder will hit the walls of the container more or even the object doing the stirring which would break apart the powder into smaller pieces.

Surface Area- The surface area of a substance increases, the rate of dissolving increases as well and therefore the substance is more soluble. The kool-aid would dissolve much faster with a powder instead of a larger sample like a sugar cube of kool-aid.

1.**__Immiscibility__** is when two liquids will not mix with each other. One potential danger when this happens is when there is an oil spill on the ocean. When an oil spill occurs, the oil floats on the water and spreads out, destroying ocean life and ruining shorelines. What is done to clean up oil spills and minimize their destructive effects on the environment?

2. **Solubility versus Rate of Dissolution** Perhaps it is because both solubility and rate of dissolution are affected by temperature, but confusion often exists about the difference between these two concepts and the effects that temperature, stirring, and surface area have on them. -Define Solubility and Rate of Dissolution -Explain how temperature, stirring, and surface area affect each concept.

Your posts are due by 9pm on March 7th

Assignment 4 5 Physical Properties of Water (Property, amt., definition, high, low, similar to others) 1.) Boiling Point=100 C - the temperature at which water boils. High compared to other molecules. 2.) Density=1 g/cc - The density of a molecule compares the ratio of the mass to the volume. Similar to other molecules. 3.) Molar Mass=18.015 - The molar mass is how many grams per mole a molecule has. Low to other molecules. 4.) Vapor Pressure=0.0212 atm at 20 C - Vapor pressure is a force exerted by the gaseous of a two phase- gas/solid or gas/liquid. Low to other molecules. 5.) Molar Volume=55.5 mol/L - The molar volume states how many moles there are in one liter of the molecule. Unusually low to the other molecules. Sources:[|Physical Properties of Water] [|Dictionary]

Assignment 3 The Greenhouse Effect is a big argument between many scientists and how it is destroying some of the earth. The greenhouse effect can be described as a increase in the temperature because of some molecules as carbon dioxide, methane, and water vapor. The greenhouse grabs this energy from the sun and transfers it into infrared. I have heard from many TV programs that this global warming is destroying the ice caps in the artic and is rising the ocean water level and will soon be destroying the shorelines of each continent. I have also heard that many artic animals will die because their ecosystem will be destroyed.

Assignment 2 [|Boyle's Law] BOYLE'S LAW: Boyle's law states that if the volume of a gas increases, the pressure of the gas decreases, and if the volume decreases the pressure of the gas increases. This example shows that as a syringe is pushed in the volume decreases and the pressure of the air molecules has increased. When the volume is increased the pressure however is decreased. [|Charles's Law] CHARLES'S LAW: Charles's law states that as the volume of a gas increases the temperature of the gas increases. This is shown in this example when an inflated balloon is put into a freezer it decreases its volume because of the temperature becoming cold in the freezer. As soon as it is brought back to room temperature however, the balloon goes back to its normal size. [|Gay Lussac's Law] GAY-LUSSAC'S LAW: Gay-Lussac's Law states that when the temperature is increased the pressure is also increased. This can be seen when an aerosol can is thrown into a fire. When the aerosol can is thrown into the fire the pressure is being increased because the temperature of the fire is causing the particles in the can to move rapidly increasing the pressure. Pretty soon the can can't hold the amount of pressure causing the can to explode. 1. Find three situations/examples that demonstrates three different gas laws. 2. Either upload, link or embed the examples to your wiki. (Cite where you got your pictures, unless you took the picture) 3. Using 2-4 sentences, explain how what you chose demonstrates a gas law -Use the kinetic molecular theory to help your explanation

Assignment 1 A direct link to the talk you watched -Why you chose that talk -Brief synopsis of the talk -Your reaction to the talk/what you learned

http://www.ted.com/talks/christopher_decharms_scans_the_brain_in_real_time.htmlI chose this video because I find the study of human anatomy such as the brain very interesting. Especially with a discovery talking about what part of the brain is working in activities such as, pain, emotions, and thoughts. In the video Christopher deCharms explains that with help of a fMRI, it shows the activity of the brain in its daily activities. It shows that certain parts of the brain work accordingly to what you are doing. For example in an activity it shows when you flex your muscle a part of the left side of the brain was working. In a photo on one of his powerpoints he shows that with this we can control our minds with what we think such as chronic pain, love, vision, fear, and many others. My reaction to this was shocking because with this new technology we can learn more about the human brain and how it acts around certain situations. With this we could also see what can cause depression and how it affects the brain and how to control it