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Ochem study guide #1
| Question | Answer |
|---|---|
| how to tell if a molecule is water soluable | if it has an ionic bond (such as NaO) or if it has the ratio 1:4. For example, 4 oh groups and 6 carbons has the ratio required whereas one oh group and 12 carbons ratio is not met |
| order of acidity for molecules (from least to greatest) | easy to remember --> alkane/alkene <<alcohol << phenol <<carboxylic acid |
| what are lipoproteins | lipoproteins main function is to transport fats and cholesterol to the bloodstream. Fats and cholesterol are not water soluble, so they cannot directly move into the bloodstream. Therefore they are encapsulated in large molecules called lipoproteins. |
| second part of what lipoproteins are | Lipoproteins have OH groups and ionic bonds, making them water soluble and able to move to the blood stream. |
| high density lipoproteins | HDL - have about 30% cholesterol and transports cholesterol from the digestive system to the liver. The liver then uses cholesterol for the biosynthesis of other molecules |
| Low density lipoproteins | LDL - have about 55% cholesterol and transports extra, unused cholesterol to the liver for storage as fat. This may cause heart disease if cholesterol of this lipoprotein leaks into the arteries. |
| what to do is you add 1H2 --> catalyst | When adding 1H2 --> catalyst to a bond, you need to remove a double bond and replace with 2 hydrogens where the double bond was at. If there are no double bonds to get rid of, then the bond has no reaction. |
| what to do if you add 2 H2-->catalyst | When adding 2H2--> catalyst to a bond, you need to remove two bonds and replace with 2 and 2 hydrogens where the each double bonds were placed. IF the bond does not have two double bonds , then there is no reaction |
| what to do if you add NaOH to a carbon bond | When adding NaOh to a bond, you remove one hydrogen and add the two electrons to the oxygen that the hydrogen was removed from. then draw an arrow to the single bond it connected to, to make a double bond and get rid of the two dots again. |
| second part of what to do when adding NaOH to a carbon bond | Then if there is carbonyl group ( a double bond from carbon leading to an oxygen with 4 remaining electrons usually on the first carbon) , you need to draw an arrow from the double bond to the oxygen and add two more electrons, creating a single bond. |
| heptane | 7 carbon bond |
| hexane | 6 carbon bond |
| ethane | 2 carbon bond |
| pentane | 5 carbon bond |
| butane | 4 carbon bond |
| octane | 8 carbon bond |
| nonane | 9 carbon bond |
| propane | 3 carbon bond |
| methane | one carbon |
| dekane | 10 carbon bond |