Bunsen burner

little girl. She looked as frightened as a mouse staring in the eyes of a cat. "Christy... I..I.." she stuttered. "You'll do fine." I interrupted. She was barely twelve and repeatedly told me she had never conducted an experiment before. I lit the Bunsen Burner and reassured her that everything would be just fine. Then, I instructed her to scoop the crystalline solid in a tube and fix the tube over the flame. I offered her a smile stuffed with motivation and luckily, she took it and used it as…

There were a few practical problems when going through the steps in the extraction and purification of paracetamol from tablets. A problem that could be faced with this is accuracy. This would be an issue if the scales were not fully set to zero. This could be overcome by calibrating the spirit level. Also it takes time for it to fully reach its weight on the reading so you may move them too quick before the right weight has been set. Too add to this the propanone may not be filled to the…

movement of a mass through it. It is the internal friction of a substance that causes it to be thick, sticky and adhesive. Apparatus needed for this investigation is: Electronic balance 750 grams of honey (around 530 mL / 530 cm3) Thermometer Bunsen burner / other source of heat / refrigerator Five identical marbles Stopwatch Procedure: Using the balance, measure the mass of an empty beaker. Note it down and add 150 grams (around 106 mL / 106 cm3) of honey to the beaker, using the balance…

or irritation to eyes / skin / respiratory system □ Gloves  micro-organisms □ Lab coats  serious damage to eyes Ventilation:  ingestion of a toxic substance / harmful substance □ Windows □ burns - chemical □ Fans □ burns - hot naked flame / Bunsen burner when packing up / hot equipment / hot liquids □ Fume Cupboards  flammable substances Waste disposal:  stains to skin and clothing □ Laboratory bin/sink  substance toxic to aquatic organisms □ Waste container (return prep-room)  cuts -…

Mallory James Lynette Burdick CHM 130 11 November 2015 Fritz Haber: For Better and For Worse Fritz Haber, a scientist not well-known to many, has played an immense role for our world today. This paper will describe him, his contributions to the chemistry field, the hardships he had to go through during his career as a chemist and the contradictions of his inventions. Fritz Haber was born into one of the oldest families of Breslau, Germany (now part of Poland) on December 9, 1868. Sadly, his…

This lab experiment was completed to determine the environment in which microbes prefer to live. The pH, moisture, available nutrients, oxygen and light all affect the rate in which bacteria grow. The majority of bacteria flourish when the pH level is near neutral; the growth rate is highly affected if the pH is off by just a little. If too acidic, the amount of time it takes the bacteria to adjust to a new environment (lag time) is increased which slows the growth, the activity of enzymes is…

: The chemical formula of a compound will be determined using the mass of each individual element that is present in a weighed sample of that compound. The chemical formula shows the proportions of elements in a specific compound. This proportion is uniform to all samples of the same compound. Using the mass of each element, the moles of the element in the compound can be found and then compared to that of the other elements. This will create our atom ratio which will lead to our mole ratio. The…

Name: Ifeolutembi Fashina Student Number: 13335535 Lab Partner’s Name: Ifeoma Agu Demonstrator: Maria Inorganic Chemistry Experiment 3: The Identification of Unknown Samples Objectives The experiments were carried out in order to identify 15 samples, through their physical and chemical properties. Theory A precipitation reaction is one which produces an insoluble salt as product. An example would be; Ca(NO3)2 + H2SO4 = CaSO4 + 2HNO3 The calcium salt is insoluble. Precipitation reactions…

Discussion The findings in this lab show that the melting point of Alum is 92.5 degrees Celsius. During the first trial a temperature of 91.0 degrees Celsius was recorded, but during the second trial a temperature of 93.0 degrees Celsius was found. Averaging the two temperatures gives a total around 92.0. The literature melting point of Alum is said to be 92.5 degrees Celsius and the data from similar studies, such as, Chemistry 103: Synthesis of Alum, together show that the results from the…

this were the reason it would be expected that all three trials results would have been affected. The error could have occurred from contamination from the forceps as the same pair was used for each trial. Although the forceps were flamed in the Bunsen burner in between sections and trials to try to eliminate contamination there is a high possibility that not all of the antiseptic was removed. In future experiments multiple forceps will be used to try to eliminate contamination. In trial three…