20* 150 mm-test tubes 10 mL graduated cylinder or pipet test tube rack 250 mL beaker ring stand PROCEDURE 1. Obtain and wear goggles. 2. Label four test tubes 1-4. Into each of these test tubes‚ measure out the amounts of solid shown in the second column below (amount per 5 mL). Note: The third column (amount per 100 g of H2O) is proportional to your measured quantity‚ and is the amount you will enter for your graph in Step 7 below. Test tube number Amount
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broken. Transfer the mixture to a centrifuge tube to separate the sample into layers‚ to help remove the water. Once the sample is finished spinning extract the organic layer and place in a test tube. TLC: To determine which mixture acetone and hexane is the best developing solvent the first step is to make mixtures of these solvents in test tubes. In the first test tube mix one part acetone (.5 mL) and three parts hexane (1.5 mL)‚ In the second test tube mix two parts acetone (1 mL) and two parts
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w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *8712516860* CHEMISTRY 9701/36 Advanced Practical Skills 2 October/November 2012 2 hours Candidates answer on the Question Paper. Additional Materials: As listed in the Confidential Instructions READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the
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Fine forceps • Eight test tubes • Test-tube rack • Access to fridge and freezer • 30 washed beetroot slices in a 100mL beaker of water • Knife Part B • 10 Test tubes • Sticky labels and Pen • Glad Wrap • Fine Forceps • 30 washed beetroot slices in a 100mL beaker of water • Solutions of: o pH: 2‚ 6 and 11 o Ethanol: 1%‚ 25% and 50% o Detergent: 1% and 5% o Water: Boiled distilled and aerated distilled • Tap water (Enough to fill 10 test tubes) • Knife • Test-tube rack Procedure:
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HSC Chemistry First Hand Investigation 2009 Scientific Report Aim: To carry out a fist hand experiment in the extraction of red cabbage pigment‚ use this extracted pigment to standardize against know pH’s‚ test 5 household items to determine the possible pH of these items by using the standardization and assess the pigment’s ability to be used as a Universal Indicator. Risk Assessment: When dealing with fire‚ the Bunsen burner should always be switched to the safety flame before lighting.
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the other. Hypothesis: If I test corn for nutrients then it will test possitive for starch‚lipids and fats but negative for protein because it only consist of those nutrients and not the other. If I test milk for nutrients then it will test possitive for lipids‚protein‚and fats but negative for starch because it consists of those nutrients. Materials: 2 safety goggles 1 eye dropper Heat source 2 beakers 4 test tubes 1 test tube clamp 1 test tube rack 1 glass stirring rod 3
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Ethanol and Hexane Four Test tubes (boiling tube) Test tubes holder Data logger Hot plates Bunsen burner Beaker 500 ml Measuring cylinder Independent Variable: The alcohol Controlled variable: Keep the same Dependent Variable: The temperature Method: 1) Prepare and clean the materials before beginning the experiment. Take four Boil tube and the data logger. 2) Take the First Test tube for the first sample‚ put 20 ml of Butanol on the measuring cylinder and after on the test tube to be more precise
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Detergent Hydrogen Peroxide Now that all this apparatus has been obtained‚ it is possible to start the experiment. Eight test tubes will be required because the experiment is being done twice in each water bath. Use a marker pen to mark the specific temperature on the test tubes so as to make sure that there are no possible errors. Now place these test tubes in a test tube rack. Take the cork borer no. 4‚ and take a cylinder of potato using the cork borer. Do this until you have eight cylinders
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Ice and water 250mL beaker (2) • Stirring Rod • 4 Test Tubes • Test Tube Clamp • Hot Plate • Potatoes • Timer • Test Tube Rack • Mortar and Pestle • Test Tube Brush • Tweezers • Ruler • Balance • Chicken Liver • Knife • Strainer Procedure- Testing Temperature 1. Gather all materials. 2. With a knife‚ cut a piece of chicken liver that has a mass of 2.5. 3. When that is calculated‚ place the chicken liver in a test tube. This will be used as the control since it will be at
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Osmosis Trial experiment Aim: Our aim in this experiment is to find out which vegetable absorbs the most liquid over a given time due to osmosis. Chosen Apparatus: we will need to use: six test tubes; a test tube rack; an apple; a potato; a cork borer; a measuring cylinder; sugar solution; scales to measure in milligrams; a ruler; a knife; and a pair of tweezers. Apparatus Why we chose it Advantages Alternative equipment apple Its an absorbent fruit and is similar to a potato It
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