Using tongs‚ remove crucible from clay triangle and place it on wire gauze. * Allow crucible to cool for 10 minutes. * Use analytical balance to find mass. Handle with tongs to avoid getting finger prints on crucible and lid. * Record mass in data table. * Add 2 g of alum crystals
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When you mix copper‚ silver‚ and nitrate together‚ you will end up with silver nitrate solution will turn blue (it has become copper nitrate). On the piece of copper‚ there would be a coating of solid silver. If a chemical reaction is going to be observed when chemicals are mixed‚ heated or any other means of altering the substance‚ then we will be able to predict the products formed. If it is observed that in the original versus the changed substance no new substances are formed‚ the change is reversible
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flask carefully. -Leaking burette- affect the titre results of titration‚ this error can be overcome by testing the burette before using it for titration. Flame test: Positive aspects of the experiment in terms of accuracy -Cleaning the wire loop before starting the actual experiment. I ensured the wire loop was not contaminated by dipping the wire loop into hydrochloric acid or nitric acid‚ followed by rinsing with distilled water. If colour
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Project Web Project web is a plan to end all vehicle transportation. This will bring the world to a new age. Spider silk is the key to this project. Its strength is very important. Its stickiness helps catch prey. The production of silk is very important. First‚ strength of silk. Second‚ the stickiness of silk. Last‚ the production of silk. The strength of silk can keep bugs from breaking through. It also prevents them from falling down. The strength of it also prevents snapping randomly. Dragline
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The most common laboratory apparatus and their uses are listed below: Beaker = A container used for measuring the liquid. Barrette = Used for measuring the volume of the solution. Wire gauze = used for spreading the heat of a burner(flame). Test tube brush = It is used to clean the test tube. Droper = It is used for adding the solution drop by drop. Magnifying glass = It is used for viewing the minute objects. Filter paper = It is used for separating the liquid and the precipitate. Stirring rod
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OBJECTIVE The purpose of this lab will be to brominate trans-stilbene by using acetic acid and pyrimidium tribromide by refluxing the mixture. To test the purity of product I will take the melting point which should be around 240 ºC along with a flame test which should be green-blue. CHEMICAL PROPERTIES TABLE See Attached Lab Notebook Copies REACTION MECHANISM In this lab we used multiple techniques to complete and verify the bromination of trans-stilbene. First technique we used was to reflux
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Gas Chromatography Purpose: The purpose of the gas chromatography lab is to find out how different substances interact with the surface of a solid. Chromatography is a separation technique that depends on the relative distribution of the components of a mixture between a mobile phase and a solid stationary phase. Chromatography measures the tendency of a substance to interact with the surface of a solid or to remain in a mobile phase. When doing a chromatography lab the mobile phase has to
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saturated fat‚ such as coconut oil‚ palm oil and palm kernel oil‚ are solid at room temperature. A candle wick is usually a braided cotton that holds the flame of a candle or oil lamp. A candle wick works by capillary action‚ conveying ("wicking") the fuel to the flame. When the liquid fuel‚ typically melted candle wax‚ reaches the flame it then vaporizes and combusts. The candle wick influences how the candle burns. Important characteristics of the wick include diameter‚ stiffness‚ fire-resistance
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a luminous yellow flame. (Fig-d) A luminous flame has 3 zones:1. A dark inner zone of non-combustion. 2. A luminous middle zone of incomplete combustion. 3. A faintly luminous outer zone of complete combustion. Formation of non-luminous flame The air holes are opened gradually by turning the air regulator until a non-luminous blue flame is obtained. (Fig-e) A non-luminous flame has 3 zone 1. A dark region of unburnt gases. 2. A small blue region on the base of the flame. 3. A pale blue outer
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Health and Safety- Potential Hazards in Health and Social Care Task 1: A hazard is something that is considered to be dangerous and has the potential to harm an individual or others around them. A risk has two separate explanations‚ how likely it is for something dangerous to hurt an individual‚ and the severity of harm that it can inflict upon someone. Usually the severity and likelihood of a risk is dependent upon the age of the person as older people and younger people are the most vulnerable
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