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Only water or dilute aqueous solution or non toxic chemicals may be disposed of down the drain with copious water
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- Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?MAKE A FLOWCHART/SCHEMATIC DIAGRAM Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins. and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To the solution containing Sn 2+ion , add 6M HCl , dropwise in the test tube. Stir well. Add excess HCl in the…Differentiate the following: 1. Absorbed water from occluded water in the sample. 2. Adsorbed water from occluded water in the sample. 3. Interstitial water from the water constitution
- How many grams of a 25% v/v hydroalcoholic solution should be used in preparing 32 fl.oz. of a 5% v/v solution. Specific gravity of the stock solution is 1.52.The presence of soluble impurities in a given substance A lowers the melting point of A because the vapor pressure of pure liquid A is decreased. Group of answer choices True FalseCommercial bleach is usually 5% solution of hydrochloric acid. true or false
- A glass plummet weighs 15 grams in air. When immersed in water, it weighs 8.5 g. When immersed in an organic solvent, it weighs 9.9 g. Calculate the specific gravity of the volatile solvent.a mixture containing only water and salt must be boiled to seperate the salt from water true or false?Solubility data of 2 furoic acid are as the following 1.0g/26mL water at 15 degrees Celsius and 1.0g/4.0ml of water at 100 degrees Celsius .How much hot water do you use to purify 2.0 g of impure furoic acid by recrystallization ? a) 8.0mL water b) 2.0mL water c) 20.mL water d) 52.mL
- For 0.250 L of aqueous solution with a density of 1.00 g/mL containing 13.7 mg of pesticide, express the concentration of pesticide in ppm and ppb.Volumetric flasks show no intermediate gradations, but they show a single mark to indicate, with high precision, the volume they contain when they are filled to that mark. For most volumetric devices, "filled to the mark" means filled until the bottom of the meniscus of the contents is exactly coincident with the mark. In lab you prepared a standard solution having a concentration of 7 ppm. Using a buret, you transferred the required amount (7 mL) of the 40 ppm stock solution into a 100.0mL volumetric flask, added 2.0 mL sodium citrate solution, 2.0 mL of hydroquinone solution, 3 mL of phenanthroline solution, and diluted with distilled water to the mark. When you were finished, the final volume in your solution was 0.5cm above the mark. The solution you prepared is __________________ Question 7 options: less than 7 ppm because you added less solvent than necessary. greater than 7 ppm because you added less solvent than necessary. less than 7 ppm because you added more solvent than…What is the boiling point in Celsius of a solution containing 35.9g of h2O and 490.5g ethanol. molal depression ethanol = 1.22C Ethanol pure boiling = 78.4 Answer to 1 decimal place
