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You have an impurity that is SOLUBLE in hot and cold water. A hot filtration is required.
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- Mixing water and arterial fluid in the reservoir of the machine is called secondary dilution. True Falseif you use tap water to dissolve a solid you can contaminate data true or false?Describe a procedure "fix" to solve the following recrystallization problems: A. No crystals are formed when the solution reaches room temperature. B. Colored impurities are present. C. Crystals are left on the filter paper during gravity filtration.
- Volumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.In the reflux distillation, an Erlenmeyer or distilling flask can be used depending on the availability of the condenser or glass tube. A. True B. FalseThe recommended patient dose for cisplatin is 20.0 mg/m². For an adult male patient with a body surface area of 1.90 m², determine the correct drip rate to deliver this dose of a 1.00 mg/mL IV solution in 2.50 hours through microdrip tubing with a drop factor of 60.0 gtt/mL. (1 drop = 1 gtt)
- During a laboratory experiment, a student mixed two homogeneous aqueous solutions. After mixing a solid precipitate was formed. What is the best way for the solid to be separated from the solution? Put it in a beaker and heat it. Filter it using a Buchner funnel, filter flask and vacuum pump. Use a pipette to remove the solid from the liquid. Scoop it out with a spatula. The solid cannot be isolated.What are the problems encountered if tablets are under or excessively lubricated?When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample should be dissolved in a very cold solvent, so that solid impurities can be filtered and analyzed the next day or the next week. True or False?