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- Before starting this procedure, please calculate the following: 18 g phthalic acid fully dissolve in 100 ml boiling water. How much is the minimum amoùnt of boiling water you need to fully dissolve 60 mg phthalic acid?50 mL of stock solution were taken and added to flask. Then 50 mL of Di water were added to the flask. This is solution 1. Then 50mL of solution 1 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 2. Then 50mL of solution 2 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 3. Then 50mL of solution 3 were taken and added to a flask and 50 mL of Di water were added to the flask. This is solution 4. Find the concetrations of each solution. Information of stock solution - molar mass- 534.3g/mole 0.587g in MilliQMaterials Needed solid I2 solid CUSO4-5H20 food dye solid (NH4)2SO4 heavy metals waste container halogenated waste container non-halogenated waste container semi-micro test tubes and rack regular test tubes and rack squash pipettes acetone cyclohexane propan-2-ol Method Part A: Solubility of ionic and molecular solids 1. Place a small amount (about the size of 1 grain of rice, see picture) of copper sulfate into each of three DRY semi-micro test tubes. Add 20 drops of water to the first test tube and gently flick the test tube with your finger to ensure mixing. 2. Repeat step 1 using acetone in place of water as the solvent in the second test tube. 3. Repeat step 2 replacing acetone with cyclohexane in the third test tube. Hold the test tubes against a white background to compare the solubility of copper sulfate in the three solvents and record your results. Discard these mixtures into the heavy metals waste container in the fume cupboard. Once these test tubes have been emptied you…
- • Rinse the test tubes with distilled water. Part B Follow these steps to complete the table: 1. Reuse the same test tubes from part A, labeled Fe2+ and Fe3+. Be sure they're clean. 2. Add 4 milliliters of iron(II) sulfate to the test tube labeled Fe2*. 3. Add 4 milliliters of iron(II) nitrate to the test tube labeled Fe3+. 4. Add 4 milliliters of potassium iodide to each test tube. 5. Add 1 milliliter of the prepared starch solution to each test tube. 6. Record your observations, noting any evidence of a chemical reaction. If there is no evidence of a reaction, write "no reaction." В I U 三E E三 三 X, Font Sizes A - Substances Mixed Iron lon Present Description of the Reaction iron(II) sulfate, potassium iodide, and starch iron(II) (Fe2+) iron(III) nitrate, potassium iodide, and starch iron(III) (Fe)A very young child is prescribed 2.0 ml of an analgesic suspension three times a day for 4/7. How many millilitres of suspension should the pharmacist dispense? О 30 O 24 20 28 A prescription requires a patient to receive a quantity of indigestion mixture with a dosage regimen of 15 ml four times a day for 5 days. Calculate the total volume that should be supplied to the patient. 200 ml 300 ml 150 ml O 100 mlRubbing alcohol is sold as 70.0% V/V solution of isopropyl alcohol in water. What volume (in mL) of isopropyl alcohol is used to make 750 mL of rubbing alcohol? A household wine is measured to be 12.9 % V/V ethanol. What volume of ethanol (in mL) would be contained in two bottles of wine if each bottle has a volume of 750 mL? 42.0 mL of anaesthetic is added to distilled water to make a 200 mL solution. What is the % V/V of the new solution?
- 9. An enzyme stock solution is 100 µg/µL. The stock solution is serially diluted 4 times by a dilution factor of 1/50. What is the concentration of each dilution?Why do Sedimentation and filtration is important in water treatment? Is a period of time important in water purification?Preparation of a standard solution of copper(II) sulfate pentahydrate 1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuSO4·5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4·5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so…
- You need to analyze an aqueous alcohol solution in the laboratory. You separated 367 mL of this solution and diluted with 40 mL of water. You then get 50 mL of the resulting solution and mixed with 50 mL 30% v/v aqueous alcohol solution. You analyzed the final solution and found out that it's concentration is 40% v/v alcohol. How much alcohol in mL does the initial solution contains?"You have 20 x SSC solution available in our wet lab, to make 400 ml 0.4 xSSC solution. How many ml 20 x SSC you will need?X 10. A students dissolves sugar in 0/1 water to make a sugar solution. What solvent did the student use? Sugar Water Sugar solution They did not use one