a Copper Ore Aim: To determine the percentage of copper present in malachite. Hypothesis: That the percentage of copper in the malachite will be four percent. Materials: 2 x 250mL beaker‚ pestle‚ malachite‚ sulfuric acid‚ water‚ 2 x filter paper‚ funnel‚ filter stand‚ Safety Precautions: Wear safety glasses at all times when dealing with chemicals and apron to avoid ruining clothes. Method: Record the mass of the malachite sample. Place the malachite into the 250mL beaker and add 20-30mL of
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well to see how they work in different concentrations of hydrogen peroxide (H2O2). Prediction would be‚ that the filter paper discs that were used‚ will rise up to the surface in a time in the tube of different concentration of hydrogen peroxide. And in different concentrations the time will be different. As higher the concentration would be‚ the less time it would take for the filter paper discs to rise to the surface. 2. Experimental design. Independent variable – is the concentration of hydrogen
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Gravimetric Analysis of SULFATE as Barium Sulfate. Objectives * To learn the techniques associated with gravimetric analysis. * To use stoichiometry to calculate the percentage by mass of sulfate in an unknown sulfate salt. Background Gravimetric analysis is a quantitative method for accurately determining the amount of a substance by selective precipitation of the substance from an aqueous solution. The precipitate is separated from the remaining aqueous solution by filtration and
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Ring stand Watch glass Small iron ring Balance Large iron ring with wire gauze Weighing dish Bunsen burner Drying oven or light Beaker tongs 10-ml graduated cylinder Filtering funnel Rinse bottle with deionized water Whatman #1 filter paper 1.8 to 2.2 grams CuSO45H2O 250-ml beaker *10 ml of 6.0 M NaOH solution * For 100 ml of a 6.0 Molar solution of NaOH‚ Using a 100-ml volumetric flask‚ dissolve
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Decantation. This separates a liquid from an insoluble solid by carefully pouring the liquid from the solid without disturbing the solid. 4. Filtration. This separates a solid from a liquid through the use of a porous material as a filter. Paper is a good filter. Filters allow the liquid to‚ pass through but not the solid. 5. Evaporation. This is the process of heating a mixture in order to drive off a volatile liquid and make the remaining component dry. The mixture that will be separated in
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the first experiment was initiated. The mixture of solids was weighed out as well as the 10cm square piece of paper and the weighing dish. The mixture was spread out in a very thin layer on a piece of paper‚ the magnet was wrapped with clear plastic and the magnet was passed over the mixture several times to remove the iron from the mixture. The iron was placed on the 10cm square paper and weighed. The next step was to separate out the sand. The sand was placed in the beaker with 50mL of water
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carbonate from aqueous solutions of calcium chloride and sodium carbonate. These solutions will be prepared from 2.01 g of calcium chloride and 1.06 g of sodium carbonate . Materials: 3 beakers 100 mL graduated cylinder rubber policeman funnel filter paper Procedure: 1. Put on your safety goggles. 2. Obtain two clean beakers. Rinse the inside of the beakers with a small amount of distilled water. 3. Obtain the correct amounts of calcium chloride and sodium carbonate. Enter these masses
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Materials Reagents Collection of hair samples 1. Stainless Steel Scissors 2. Plastic bags 3. Gloves 1. Hot water 2. Ethanol Washing the hair samples 1. Forceps 2. 100 ml beakers 3. Electronic weighing balance 4. Magnetic stirrer 5. Magnets 6. Filter paper 1. Diethyl Ether 2. Acetone 3. Deionised water 4. pH 6 Shampoo Digestion of hair
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| Filter Funnel | X1 | Filter Paper | X1 | Conical Flask | X1 | Electronic Balance | X1 | Sand-Salt Sample | Given Amount | Evaporating Basin | X1 | Bunsen Burner | X1 | Gauze Mat | X1 | Tripod | X1 | Thermometer | X1 | Distilled Water | Given Amount | Method: 1. Record mass of sand-salt sample‚ beaker‚ evaporating basin and filter paper on electronic balance. 2. Add distilled water to sample. Mix thoroughly with stirring rod until salt dissolves. 3. Filter out
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next cut a square sheet of paper and weighed it to find it weighed 1g. I emptied the contents of my dish onto another sheet of paper in a very thin layer. I wrapped the magnet in a sandwich bag and ran it over the mixture to separate the iron. I then carefully pulled the magnet away from the sandwich bag and let the iron fall onto the square piece of paper. I repeated this 3 times to ensure I had all of the iron from my sample. I then weighed the square piece of paper and iron shavings and got a
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