For models the setting is set as viscous and laminar flow. The fluid material used in this case is water. The cell zone conditions must now be converted from air to the liquid water. A boundary condition is created at the inlet surface as a velocity magnitude of 0.2m/s. The velocity is set to 0.2m/s, which represents the blood flow along the cylinder.
The actual volume of water differs as a very small amount of water might being left out in the pipette hence, make the actual volume of water differs. From all of the actual volume of water being transferred, the average obtain is 24.71ml. So, the volumetric glassware, pipette is considered as accurate and precise since it transferred approximately 25ml of water. In Part B, the calibration of burette was done. Burette can actually transfers water more accurate compare to pipette and micropipette.
The effect of the random errors from this experiment might due to the inaccurate timing as the reflect time to stop the stopwatch when 30cm3 of carbon dioxide is collected in 100mL measuring cylinder is often various from time to time. Time may be longer or shorter than the actual time taken to collect 30cm3 of carbon dioxide. This will then lead to the wrongly calculation of the rate of reaction as the formula of the rate of reaction is: Rate of reaction=1/(Time taken to collect 30.0cm³ of carbon dioxide (s)) Next, the sources of the random errors in this experiment are the variation in eye level when taking the readings of a measuring cylinder to collect 30cm³of carbon dioxide and the widely spaced graduation mark on a 100mL measuring
The substitution reaction was successful but not fully effective. 19. If the data was inconclusive, then comparing various compounds and the unknown based on physical characteristics would be the first step, titrations would also be a good method. 20. To get a better yield, redoing the experiment would require careful attention in the recrystallization steps: amount of solvent used, how hot solvent is, if the mixture cools to room temperature before placing it in an ice
The volume of water added into the tube at regular time intervals to maintain a constant depth is recorded from which the infiltration curve can be drawn. 2.0 Measurement of Evaporation The rate of evaporation is measured using evaporation pans. The general procedure involves filling an evaporation pan with water up to a defined mark. The water lost is estimated by determining the volume of water required to fill the pan up to the defined mark on a daily basis. An allowance has to be made for rainfall.
The osmotic pressure coefficient must be determined for different solutions. It has been determined by various researchers and investigators to be less than unity and slightly increases with increasing solution concentration if the solute is not known or it is complex, we have to use mass concentration instead of molar concentration. For convenience: this model assumed to be at a constant temperature and is incorporated with the other constant Y which simplifies osmotic pressure to solute concentration coefficient. The value of Y was assumed t-o be constant over the operating range of the solute concentration. In corporation of osmotic pressure equation into the expression for the solute flux Eq.
The fastest pH was 6 (total:34.5), and it seems that there wasn’t a large change which resulted in a stable structure. The temperature in our experiment was not very high which didn’t result in denaturation of peroxidase. The temperature seemed to be a constant that didn’t affect the experiment. If the temperature was higher in pH 3 and low in pH 10, then it would cause pH 3 to denature even more which would make the pH 3 total about 4.0. Substrate concentration basically means the amount used for the substrate.
In order to calculate activation energy, the rate constant must be calculated in different temperatures, in this particular experiment, rate constant is calculated in following temperatures: 9°C, 22°C, 29°C, 37°C, 45°C. Rate constant can be calculated by dividing the initial rate of the reaction by the concentrations of CH3COCH3 and H+. In this experiment, the units of k are mol−1 dm3
This is due to the boiling points of the two compounds are too close for an effective simple distillation. A simple distillation only works when the boiling points of the two compounds are separated by at least 50 °C (CITATION). Meanwhile, the boiling points of the compounds of the mixtures are 82.3 °C for 2-pronanol and 117 °C for 1-butanol (National Center for Biotechnology Information). As well, while fractional distillation is more difficult due to the added fractionating column and insulation, it allows for better separation and condensation of the individual compounds. This ensures that only the compound with the lower boiling point is completely condensed before the compound with the higher boiling point begins to condense.