Lab 10.1: Solvents (Like Disolves Like)

1. Salt and sugar are definitely polar because they have a strong attraction to the polar water(like dissolve like).The samples with the other solvents are non polar and since the polarity is unalike they do not dissolve in the solution.
2. Vegetable oil is definitely non polar because they have a strong attraction to the non polar hexane(like dissolve like).The samples with the other solvents are polar and since the polarity is unalike they do not dissolve in the solution.
3. Ethanol has a polar and non polar end since it only can slight dissolve both non polar and polar solutes.
4. Ethanol could dissolve in both water and hexane since it has a polar and non polar side of the molecule it allows it to dissolve with polar water and the non polar side of hexane. This makes the solution slightly soluble as only one side of the molecule can be dissolved with like side of the molecules polarity matching the solvent.
5.  

	Type of Molecule	Solubility in Water	Solubility in Hexane
NH3	Polar	Soluble	Insoluble
I2	Non polar	Insoluble	Soluble
HCl	Non polar	Insoluble	Soluble

• 6. Ionic materials dissolve well in water because they are both polar. Hexane is non polar, solutes dissolve in other solvents of the same polarity as themselves.

Enrichment:

Nitrogen, oxygen, and carbon monoxide are all non polar so they do not dissolve in the polar water, like dissolve like. Oxygen is produced for fish by the plants who use carbon and carbon dioxide is stored in water these ions are an important part of natural buffers that prevent the water from becoming too acidic or too basic for aquatic life to live it.

Blog 9.2: LeChatelier's Principle

When HCL is added to the system the system shifted to the right to balance out the HCL indicted by the dark blue color change this means concentration of Cl- ion increased.

1. Since the system is exothermic when heated the heat is added to the reactant side of the system. This causes the system to shift to the right (indicated by dark blue color).
2. If the reaction is endothermic the reaction has more potential energy on the reactant side of the system. This means the heat of reaction has a positive sign because it is storing(gaining) energy. If the reaction is exothermic the potential energy decreases because it is being released in the form of heat this is shown on the product side of the system. This means the heat of reaction is negative because it i loosing energy.
3. Ag+ and Cl- when but together do not create a soluble compound according to table f. This was shown in the lab when mixing the silver with chlorine you are left with a cloud showing in the mixture showing they are creating a new compound and not mixing together. The solution around it was light pink this indicates a shift to the left decreasing Cl- to balance out the system.

Station 3 question:

1. When increasing pressure the gas bubbles in the soda go away to put the solution in equilibrium. When you decrease pressure you give more space for air bubbles to form to shift the system back into equilibrium. This is the same as when you open a soda you are decreasing the pressure of the soda inside the can so the formations of bubbles to balance out the can cause it to "effervesce" (release gas).

Enrichement:

1. Chickens pant out CO2 gas.
2. When the CO2 decreases the equilibrium of the system shifts to the right.
3. When the system shifts right it causes a decrease in the amount of CaCO3 (egg shell) produced by the chicken.
4. The panting resulting in thinner egg shells because as a result of having less CaCO3 produces less egg shell for the eggs this means the eggs have to have a thinner shell.
5. To insure their chicken produce normally think egg shells in warm weather farmer could air condition the chicken coupe. This takes advantage of Le Chatelier's Principle by manipulating the temperature of a system to achieve the results you want.