1. (3 pts) Describe the chemical structure of the plant cell wall and plant cell membrane. Make sure to include whether each structure is hydrophobic or hydrophilic. The plant cell wall contains cellulose and the membrane contains phospholipids. Cellulose is hydrophilic‚ meaning that it likes and is attracted to water. The phospholipid bilayer that makes up the cell membrane is both hydrophilic and hydrophobic. It contains hydrophilic heads that face the outside of the bilayer‚ and hydrophobic
Premium Cell membrane Cell Lipid bilayer
Lab 3: Bromination of Acetanilide CHEM 2110 Hassan Alsaleh 0525970 Due date :11/02/2015 Q1: To find the limiting reagent we need to find the number of moles of acetanilide‚ and the number of moles of Bromine. Mass of Acetanilide used = 0.67g Molar mass of Acetanilide = 135.16g/mol[1] Number of moles of Acetanilide = (0.67g) / (135.16g/mol) = 0‚005 mols Volume of Bromine = 0.25ml Density of Bromine = 3.103 g/ml[2] Mass of Bromine = (0.25ml) X (3.103g/ml) = 0.78g Molar mass of Bromine
Premium Stoichiometry Yield Oxygen
Debunking The Myths About High Cholesterol Or 5 Myths That Prove You Are Thinking All Wrong About High Cholesterol Over the past few years‚ we’ve learned a lot about the harmful effects of high cholesterol and how to keep this at bay. However‚ if you do not follow health news carefully‚ there is a possibility that you might have erroneous information about the risk factors associated with it. There is a great deal of misinformation circling around about high cholesterol. Today‚ people try to avoid
Premium Nutrition Obesity Health
BroIn this experiment of the relative rates of free-radical chain bromination‚ we were expected to be able to determine the relative reactivates of the many types of hydrogen atoms involved toward bromine atoms. Bromination is defined to be a regioselective reaction meaning bromine has preference of making or breaking a bond over all other directions that it may have had available. In this case‚ Markovnikov’s rule is revealed to be the case in this situation that states that adding a protic acid
Premium Chemistry Acid Oxygen
The purpose of this experiment was to isolate and purify cholesterol from egg yolks. Two hard boiled egg yolks were twice extracted with diethyl ether and methanol‚ with the filtrate collected via vacuum filtration. Potassium hydroxide pellets were added to the filtrate‚ the ether was distilled off‚ and the mixture was saponified by reflux. The crude cholesterol was isolated through a series of ether extractions and aqueous washes; then the ether was dried with MgSO4 and removed by rotary evaporation
Premium Distillation Egg yolk Alcohol
Hydrocinnamic acid underwent bromination using N-bromosuccinimide and AIBN. As one lab partner set up the reflux apparatus‚ the other measured the chemicals used in the lab experiment. 2.10 g of hydrocinnamic acid was used. It was observed as white and had a slight cinnamon smell. The amount of NBS was 2.49g and was measured in the fume hood. AIBN was measured at .030 g. 10 mL of acetic acid was also obtained. The reflux apparatus consisted of a 25 mL flask with a stir bar in a water bath. The chemicals
Premium Chemistry Water Sodium hydroxide
LAB REPORT! EXPERIMENT#5‚6! MANPREET KAUR KHAIRA! LAB PARTNER: VIAN RAIES! The purpose of this lab exercise was to perform the bromination of (E)-1‚2-diphenylethene (trans-stilbene) by addition reaction in which bromine was added across the double bond to yield a vicinal dibromide. The next step was to perform a double elimination reaction by product gained to synthesize an alkyne‚ that is‚ 1‚2-diphenylacetylene. The two major techniques used in this lab were TLC analysis and UV-vis spectroscopy
Premium Chemistry Oxygen Chemical reaction
Organic Chemistry I LAB EXAM: FINAL BROMINATION OF BENZENE SYNTHESIS AND PURIFICATION OF BROMOBENZENE: PROCEDURE DATA TABLE Chemical Boiling point C Melting Point C Density g/mL Solubility Benzene 80.1 5.5 0.88 Slightly in H2O Toluene 110.6 -93 0.87 Slightly in H2O Bromobenzene 155-156 -30.8 1.50 Insoluble Dibromobenzene 220.40 87.31 0.96 Insoluble MATERIALS: Graduated cylinder Weight scale Buchner funnel Filter flask Rubber stopper Hot plate Thermometer Conical funnel Various
Premium
1. Cellulose‚ starch‚ and glycogen are very similar‚ yet very different. Describe the process by which each of these molecules is formed. Why does the subtle difference in how the simple sugar monomers are bonded in starch and cellulose affect how the two molecules are used? Cellulose is built from glucose molecules bonded covalently together through a process known as hydrolysis. Hydrolysis is a chemical process in which a molecule of water is added to a substance. Each alternating glucose
Premium Protein Bacteria Glucose
The purpose of the experiment was to perform an electrophilic addition reaction by the bromination of cinnamic acid. The product of this reaction is 3-Phenyl-2‚3-dibromo propionic acid‚ which is purified by recrystallization. Cinnamic acid (3-phenylprop-2-enoic acid) is an unsaturated carboxylic acid. The electron rich π cloud (see Figure 1) in the double bond of this structure is nucleophilic and can be considered a Lewis base. It can therefore be saturated by the addition of a halogen to the double
Premium Oxygen Chemistry Carbon