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- Station 2: Density column In the graduated cylinder, you have molasses, water (blue), corn oil, and ethanol (red). They have the following densities: Substance Molasses Water Corn Oil Ethanol Density 1.45 g/mL 1.0 g/mL 0.92 g/mL 0.79 g/mL Polarity Polar Polar Nonpolar Polar Viscosity High Low Low Low 1. Explain why the column is arranged in the order it is according to density.PAPER CROMATOGRAPHY • Define chromatography • Demonstrate an understanding of the process of chromatography • Describe the steps involved in a chromatography investigation Explanation Coloured inks are often made up of several different inks. Each colour of ink will get carried a different distance by the water, allowing you to see all of the different inks. Try this with different colours to see what actually goes into a colour. This technique is called chromatography and can be used in chemistry to find out what is in an unknown mixture. II. Materials .Felt tip pens (non-washable) . Kitchen roll .A bowl or cup . Water • Scissors III. Health and safety • Make sure that you thoroughly clean any equipment after the experiment before using for food IV. Procedure Method 1 1. Take a sheet of kitchen roll and draw a simple picture with a non-washable felt tip pen. 2. Place the sheet over an empty bowl. This is to keep the paper from getting too wet. 3. Carefully add a few drops of water…In which option is the order showing whether the questions given below are true or false? ( ) Airborne humectants are generally called hygroscopic substances. ( ) Removing water from solids can be done by heating your sample in the oven just below its melting point. ( ) Drying capacity is a measure of the drying efficiency of the dryer. ( ) Drying intensity is the amount of water held by 100 grams of dryer. ( ) For the phenomenon called "blooming" to occur, the vapor pressure of the hydrate system must be higher than the partial pressure of water in the air. A. Right, Wrong, Right, Wrong, RightB.Right, Right, Wrong, Wrong, RightC.Right, Wrong, Wrong, Wrong, RightD. Right, Wrong, Wrong, Right, RightE.Right, Right, Wrong, Wrong, Right
- Ceramics used as abrasives must be hard and tough and be able to withstand high temperatures that arise from frictional forces. What is the minimum required hardness (measure in Mohs scale) for a material to be used as abrasive? Your answerPlease choose an appropriate technique(s) to separate following compounds (it can be one, more than one, on none): Compound Melting Point Density Boiling Point Molar mass Phenol 40.5°C 1.07 g/cm 181.7°C 94.113 g/mol Toluene -95 °C 0.87 g/mL 111 °C 92.141 g/mol Simple Filtration Column Chromatography Distilation Crystallization/Re-Crystallization Separatory funnel None www. MacBook AirA chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of diethylamine, carbon tetrachloride, tetrahydrofuran, glycerol, and pentane. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information: density 0.71 g-cm liquid diethylamine carbon tetrachloride tetrahydrofuran glycerol pentane 1.6 g-cm 0.89 g-cm -3 1.3 g-cm 0.63 g.cm Calculate the density of the liquid. Round your answer to 3 significant digits. Given the data above, is it possible to identify the liquid? -3 -3 -3 Next, the chemist measures the volume of the unknown liquid as 0.741 L and the mass of the unknown liquid as 523. g. If it is possible to identify the liquid, do so. -3 g.cm O yes O no diethylamine. carbon tetrachloride tetrahydrofuran glycerol. pentane…
- Cincle 4he chir al centkr (s) 16. F H3 C t \BrWhat do the symbols TD and TC mean on volumetric glassware?A student wanted to determine the moisture content of a solid sample using gravimetric methods following the AOAC 930.15 method. The following data were obtained: mass of crucible (container): 24.6743 g initial mass of crucible and sample: 34.2134 g final mass of crucible and sample: 32.0567 g Calculate the %moisture of this sample. Show your entire solving process. You may upload a photo of your solution or you may just type it in.
- A cellulose sponge, 7.0 cm x 12 cm x 2.5 cm, weighs 12.0 grams. Calculate the specific gravity of the sponge.Bone is a biomaterial also referred to hydroxyapatite containing mostly calcium phosphate. Related with the strontium amount analysis of this material, which one correctly states the sample-analyte-analysis, respectively?Filtration of samples A, B, and C show no residue left. After letting them dry in different beakers, SAmple A remains no residues. Sample B shows crystal leftovers, and sample C show brown film on the beaker walls. This means that: a. Two or more samples are heterogenous b. Two or more samples are homogenous c. all sample have 2 or more phases d. all samples are pure