My data shows that in lab one, the bottom and the top are not very different. In the line graph, it shows that the two lines are very close to each other showing that they are not apart by a ton. The reason that this conclusion appeared was because the heat traveled from the bottom of the beaker to the top through a liquid. This shows in my research because it shows that the temperature at the top of the beaker was heating up almost just as fast as the bottom. This reminds me of the motions it takes to heat a liquid, how the hotter water at the bottom moves up while the colder water moves down and so
Paper chromatography can be used in separating amino acids and anions, RNA fingerprinting, and testing histamines and antibiotics. (Infromation received from sonic.org Purpose The purpose of this experiment was to separate the dyes that these markers are composed of and show how chromatography works. Materials * Four different markers (including one black permanent marker) * Rubbing alcohol or isopropyl alcohol * Coffee filters (2) * Tall glasses or plastic cups (2) * Pencil * Ruler * Tape * Table salt * Water * Measuring cups/spoons * Clean pitcher or 2-liter bottle Procedure 1. Your first task is to cut the coffee filter into a rectangle measuring three cm by nine cm. You will need 2 for this lab.
Solub. or Reaction w/cold H2O: No reaction Solub. or Reaction w/hot H2O: No reaction Litmus test: No reaction on red or blue. Dilute HCl: Solution turned yellowish, but no actual reaction on copper Dilute NaOH: No reaction Substance: Zn Color: Silver Odor: None Effect of Heat: None Solub. or Reaction w/cold H2O:None Solub.
Allow the filter paper to dry overnight. 11. Weigh the filter paper with the contents inside. Record the weight. Data: | Fe | CuSO4 | Cu | FeSO4 | Filter Paper | Filter Paper with contents | Weigh Paper | Before | 1.445 g | 6.185 g | -- | -- | 0.770 g | -- | 0.29 g | After | -- | -- | 1.850 g | (drained out) | -- | 2.620 g | -- | Evaluation: 1.445 g Fe x 1 mol Fe x 1 mol Cu x 63.3546 g Cu = 1.64 g Cu => Theoretical Yield 55.847 g Fe 1 mol Fe 1 mol Cu 1.850 g Cu = 112.8 % => Percent Yield 1.64 g
Developed TLC plate by placing plate in chamber not contacting filter paper.7. Removed plate from chamber when solvent front was 1 to 2 cm from top of plate.8. marked solvent front with pencil line & set on paper towel to dry.9. Marked position of compounds on plate using a UV lamp10.Calculated Rf values for each spot11. determined results were unsatisfactory to how experiment was supposed to turn out.Part B1.
The second case study was covered in an article by Science News. In this study, two different types of water were used, distilled and tap water. The tap water was heated to 100 degrees Celsius and the distilled water was cooled to 25 degrees Celsius. They were placed into identical copper containers. The test was completed 27 times and each time the hotter tap water froze before the cooler water.
Without enzymes normal metabolic reactions would be sluggish. The purpose of this lab was to measure the extent of enzyme reaction on given substrates by means of color change. The effects of temperature and pH will be tested and their influence on the enzyme recorded. If the environment is cold, then enzymes will not activate and if pH is high, then enzymes will not activate. This I believe because at low temperatures reactions tend to slow down and at high pH everything will denature.
Put on a safety goggles. Use a thermometer to measure the initial temperature of the water in the soft drink can. Measure the initial mass on a mass scale. Place the fuel under the soft drink can (If the fuel is half a cashew nut or cheetos stick it to a wine cork using a pin, then wrap the wine cork with a sheet of aluminum foil). Set the stopwatch to 1 minute.
Read the absorbance at 20 second intervals from the start of the mixing. Then record your measurements on the table. After two minutes remove the tube from the spectrometer and visually note the color change. 6) Now mix the contents of tubes 4 and 5, transfer to a cuvette, and repeat your measurements for two minutes at 20 second
The slower molecules gain more thermal energy and collide with other molecules in the cooler object. This process continues until heat energy from the warmer object spreads throughout the cooler object. Some substances conduct heat more easily than others. Solids are better conductor than liquids and liquids are better conductor than gases. Metals are very good conductors of heat, while air is very poor conductor of heat.