Obtaining Zinc Oxide from Calamine Introduction Calamine is a mineral containing zinc carbonate (ZnCO₃) On heating it decomposes as: [IMAGE]ZnCO₃ ZnO + CO₂ (C = 12, 0 = 16, Zn = 65) This equation allows you to calculate a theoretical conversion of calamine into zinc oxide. As when using the theoretical conversion; [IMAGE]ZnCO₃ ZnO + CO₂ [IMAGE]65+12+48 65+16 + 12+32 [IMAGE]125 81 + 44 This means that one mole of calamine weighs 125g and when heated it produces
What makes a good writer? More importantly; what makes a good reader? It’s the critical examination skills that Vladimir Nabokov pushes for as well as a good imagination. And don’t forget a good dictionary! Nabokov argues that to be a good reader no preconceptions should have been made upon entering into a new text. He feels that it is insulting to the author when readers limit the world created by the author through their prior generalizations. But forming ideas prior to analyzing something is
information will be applied. Synthesis 1. A piece of Magnesium was obtained at about two centimeters in length. The strip was thin and easily bent or twisted. It had a metallic surface and was brittle. It was silver in color. A flame from a Bunsen burner was held to the Mg, and it ignited, giving off a brilliant white light. Looking directly into the light resulted in temporary blindness, which would explain the warning on the procedures that strongly suggested not looking directly into the light
accurate as possible. Also make sure the stop clock is started at the same point each time a measurement is taken. I will carry out the investigation by: 1. Set up the Diagram 2. Put the test tubes of Sodium Thiosuphate into the beaker above the Bunsen burner 3. Put a thermometer into it 4. Remove the test tube once its reached the desired temperature and pour contence into the empty beaker 5. As you begin to pour the test tube of Hydrochloric Acid contence into the beaker start the stop clock 6
and reagents · Boiling tubes · Dark card · Bunsen burner · Thermometer · Weighing scale · Burette (50cm3) · Clamp · Stand · Potassium nitrate · Deionised water/ distilled water Safety · Wear goggles for eye protection at all times. · Laboratory coats must be worn at all times. · Wear gloves to avoid chemical contact to skin, potassium nitrate. · Long hair was tied back when Bunsen burners were used. Procedure 1. 10g of potassium nitrate
Robert Wilhelm Eberhard Bunsen was born on March 31, 1811 in Göttingen University. He was a German chemist, and from his invention of the Bunsen burner, which Peter Desega had aided him with, he became famous around the world. Robert had earned his highest degree award in his father’s University in Germany. Robert was said to be the most influential chemistry teacher of his time, and had even taught Dmitri Mendeleev who was the creator of “The Periodic Table of Elements.” Furthermore, Robert and
lime water. The lime water will react by bubbling a producing a gas and the Colour of the liquid will whiten. The reason this will happen is because of the reaction of the gas that the copper carbonate will produce by being heated. Apparatus 1x Bunsen burner 1x heat mat 1x box matches 1x glass tube 1x rubber stopper 2 x retort clamp 3 x test tube, medium (~150 x 15 mm), borosilicate ("pyrex") 1 x spatula 1 x electronic scales Copper carbonate (approx. 5g) 50ml lime water 1 x Hydrochloric acrid (10
solutions by completing a flame test and a precipitate test? In this experiment we will work out two different unknown solutions using a flame test and a precipitate test. A flame test is a procedure you use in chemistry, predominantly with a Bunsen burner, to detect certain elements, based on their emission of colour that they give off. The colour of the flame will depend on what substance (or solution) you are using during the experiment. It is different with a precipitate test because a precipitate
Safety & Waste In this experiment, you will be working with a Bunsen burner. The hazards involved with this device involve burns, either of people or objects that are not intended to be burned. When working with a Bunsen burner you should ensure no loose clothing and have your hair tied back. Magnesium metal is flammable. It burns with an intense white flame that is difficult to extinguish. Keep loose magnesium away from Bunsen burners until it is in a covered crucible. Sometimes the magnesium ignites
The Effect of Temperature on Capillary Action Design Background Information: Capillary Action is the ability of a liquid to flow through a narrow space without the assistance of external forces such as gravity. It occurs because of intermolecular forces between the liquid and surrounding surfaces. There are three main variables that determine whether a liquid will posses capillary action. (Davis, 1995) 1. Cohesive Force: The intermolecular forces that cause liquids to resist separation and to
The Effect of Temperature on the Rate of Reaction Aim-We is going to investigate how temperature effects the rate of reaction when we use a Magnesium Ribbon and dissolve it in Hydrochloric Acid. Different Variables-There are four different variables that effect the rate of reaction, surface area, concentration, temperature and catalysts. Here is some information on each variable with diagrams. How does surface area effect rate of reaction? In a substance the rate of reaction will
Change of Volume of a Gas Planning- Aim * Determine how the volume of a gas changes with the temperature for a fixed amount of gas and pressure. * Determine absolute zero Hypothesis ---------- Volume is directly proportional to Temperature ---------------------------------------------- Preliminary Test ---------------- A preliminary experiment wsa carried out to test our apparatus. In this test we used an alcohol thermometer to see if there was any change in volume
very slowly in order to not pass the melting point. 3. The temperature when alum melted was recorded in the data table. Part 2. Determination of the Water of Hydration in Alum Crystals 1. The Bunsen burner was set up under a ring stand fitted with a ring clamp. It was adjusted to be 1 cm above the Bunsen burner, and the clay pipestem triangle was placed on the clamp. 2. The crucible and cover were placed on the triangle, and they were heated until they turned red hot. Afterwards, they were removed
achieve this formula by taking the moles of Magnesium and the moles of Oxygen and dividing them. This will give you the ratio of the compound MgO and therefore give you the empirical formula. The materials for this experiment include Magnesium, a Bunsen burner, a analytical balance, and an evaporation disk. Beginning the experiment the empty evaporating dish is placed on the analytical balance and the mass is recorded. Then, Magnesium is placed in the evaporating dish and put back on the analytical balance
weighing scales * A measuring cylinder * 5 spirit burners (1 for each fuel) * A copper calorimeter with a lid * A thermometer * A clamp * A Bunsen burner * A stop clock Method ====== The first step was to carry out some preliminary tests to establish the best set up for our apparatus. To gain reliable results we needed a temperature rise of 50 degrees centigrade in the quickest time possible. Using the Propanol burner with different volumes of water we tested the flame
Aim To determine if the mass increases when we burn the magnesium and change it into magnesium oxide Research The type of reaction that took place in this experiment is a chemical reaction and exothermic reaction. It is a chemical reaction because the magnesium and oxygen form to create MgO. The burning of the magnesium is also an exothermic reaction because the magnesium released energy. The law of conservation of mass shows us that mass cannot be destroyed nor created but it can be changed. During
How branded and unbranded mouthwash effect cell numbers? Research and Rationale: In 2001 it was reported by BBC news that serious dental diseases could be one cause of diabetes. Gingivitis is the periodontal disease that is talked about in the article, this is a disease that causes inflammation to the gums and if left untreated could lead to periodontitis which eventually leads to the loss of teeth. There is no hard evidence for gum disease leading to diabetes however a spokeswomen for the British
Background Information Enzymes are proteins that serve as biological catalysts in a wide variety of life sustaining chemical reactions that take place in cells. As catalysts, enzymes lower the activation energy it takes a chemical reaction to occur. Because of this enzymes serve to speed up the rate at which the chemical reactions can occur. However, enzymes are substrate specific. This means only one kind of enzyme will bond with one kind of substrate on the active site, the place where the chemical
Chemistry Aim: I am trying to find out whether the equation 2CuCO3 ® Cu2O + 2CO2 + ½O2 or the equation CuCO3 ® CuO + CO2 is correct for the decomposition of copper carbonate. Introduction: This is my background research, this information may help me when I am trying to see which equation is correct. I have used the book Chemistry 1 by OCR as my reference. Relative Atomic Mass: This is the mass of an atom of the element relative to the mass of an atom of carbon-12 which has a mass of
Boiling tube - To hold 30 cubic centimetres of water in. Heat proof mat - So the Bunsen burner doesn't burn the table. Bunsen burner - I need the flame to light the taper. Measuring cylinder - To measure 30cc of water in. Mineral wool - So the taper can light the fuel easier. A stop clock - To time how long the fuel will burn. Taper - To light the fuel by using the flame from the Bunsen burner. Ruler - To measure the distance from the crucible to the boiling tube. Crucible