Pipette

The objective of Experiment one (both Week one and two) was the separation and examination of Ethanol from complex mixtures using solvent-solvent extraction and chromatography. Week one involved retrieving the concentration of Ethanol and the partition coefficient from standard solutions utilizing the calibration method. Week two was centered on the use of a standard addition method to find Ethanol concentrations in beer samples. Overall, the experiment addressed the issues associated with…

Pattern, Problem, Correlation: Algae are very extensive, and have proven to be very beneficial to our environment. They are a “diverse group of predominantly aquatic organisms that account for almost 50% of the photosynthesis that takes place on Earth” (Moroney et al. 2009). Due to this prevalence of algae, it is important to know its uses. Firstly, “algae are proposed to play a role in the global carbon cycle by helping remove excess carbon dioxide from the environment” (Moroney et al. 2009).…

Molecules Project 1: Chemiluminescence Luuk Adema & Ewout van der Veer S2794640 & S2680254 luukadema@hotmail.com & ewoutvanderveer@msn.com 31-10-14 F. Mecozzi, E. Hagting & M. van Zuylen Abstract Luminol was synthesized and the light intensity of its luminescence was tested. The yield of the synthesis was 55%. Measurements of the intensity of luminescence were done under standard and optimal conditions resulting in peak intensities of ±0.02 lux (standard) and ±0.03 lux (optimal). It has been…

Urinalysis is mostly a labor process used to observe urine at a microscopic level (Ben-Ezra, 1998). In the urinalysis, one of the experiments conducted was observing the physical characteristics of the urine sample. The physical characteristics included the color, transparency, odor, and pH level. Observing and determining the color, transparency, odor, and pH of urine can tell the person’s diet and possibly if there might be a bodily issue going on (Gutierrez, 2014). For the first physical…

detergent must be added to the peroxide, if the amount of detergent is not consistent, then the results may not be accurate as more foam can be produced because of the additional amount of detergent. For future investigations, instead of using the teat pipettes, the amount of detergent could be measured in a measuring cylinder to ensure that the amount of detergent added remains consistent. Increasing the sample size will increase precision, minimising the impact of random errors. Moreover, an…

Data Calculated from Experiment Solid-Liquid Weight (g) Solid-Liquid % Recovery Liquid-Liquid Weight (g) Liquid-Liquid % Recovery Acid 0.01 20 % 0.028 56 % Phenol 0.011 22 % 0.001 2 % Amine 0.013 26 % 0.005 10 % Neutral 0.03 60 % 0.026 52 % Table 1 shows the data obtained from this experiment of both the solid-liquid extraction (on the left side of the table) and the liquid-liquid extraction method (on the right side of the table). It shows that in the solid-liquid extraction, most of the…

the identity of three unknown samples by using two different tests: The Iodoform test and the Tollen’s test. Procedure Part A- Iodoform Test • In three clean and empty test tubes, three drops of each respective unknown liquid were inserted via pipette to their respective labeled test tube (which were labeled according to whatever compound they would contain, i.e. A, B or C). These test tubes were subsequently treated with 2 mL of water and 2 mL of 10% aqueous sodium hydroxide (NaOH) solution…

Introduction What if scientists could create a human being in a laboratory with only DNA? Advancements in genetic engineering technology have made that a viable option in the foreseeable future. While “test tube babies” cannot yet be born from only lab equipment, there are ways that a child’s DNA can be manipulated in ways that can eliminate hereditary disease genes and mutations. Since the field is still experimental, this is what it has been limited to up until this point. This strict…

be type B . In a blood spatter lab, it was concluded that the droplets of blood at the crime scene fell at a 90 degree angle from roughly the height of a person bending over. This was tested by dropping droplets of blood from varying heights using pipettes and micropipettes. Multiple trials were run for the most accurate results and great care was taken to ensure credibility. After analyzing the results to this experiment, it was agreed that the blood droplets at the crime scene fell from…

“Classifying Chemical Reactions - Lab Report” I - Introduction - Chemistry is the study of the composition, structure, properties and change of matter. In chemistry, chemical and physical changes are used to help scientists understand how different substances react given various circumstances. A chemical change is any change resulting in the formation of a new chemical substance(s). A physical property is any change that does not involve the chemical makeup of a substance at all. In total…