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- As the imfa becomes stronger, w/c of the ff properties increases? boiling point, vapor pressure, mass,melting point, density. Which of the following would LOWER the purity of the distillate collected from the rubbing alcohol mixture? SELECT ONE OR MORE: EXPLAIN WHY IT IS INCLUDED I. Using cold water in the condenserII. Not discarding the first milliliter distilledIII. Addition of boiling chips into the mixtureIV. Maintaining the temperature of the hot plate above 100°CIn your own words explain briefly the reason for the following significant steps in the procedure for the preparation of permanganate solution: 1. The storage bottle should be a dark or AMBER-colored reagent bottle
- CREATE A SCHEMATIC DIAGRAM FOR THIS PROCEDURE: C. Preparation and storage of standard solutions 1. Use the weighed and transferred NaCl powder in procedure B. Dissolve it in about 10 mL distilled water. Use a stirring rod to gently stir the solution until it has been dissolved to an extent. Make sure you will not incur any noise while stirring. 2. When the NaCl powder is partially dissolved, transfer the resulting solution into a 100 mL volumetric flask. Use a stirring rod and funnel. 3. Repeat steps 1 and 2 until no NaCl remains in the beaker and until you are almost at the mark of the volumetric flask. 4. Rinse the last portion of the solution from the stirring rod into the volumetric flask with a stream of water from the wash bottle. Rinse the funnel and remove it. Dilute the solution in the flask using a Pasteur pipette until the bottom of the meniscus is even with the graduation mark. 5. Put a stopper on the volumetric flask. Invert the glassware up and down around five…Which of the following would LOWER the purity of the distillate collected from the rubbing alcohol mixture? Using cold water in the condenserII. Not discarding the first milliliter distilledIII. Addition of boiling chips into the mixtureIV. Maintaining the temperature of the hot plate above 100°C Select one: I and II III and IV II and IV II onlyYour employer hands you a heterogeneous mixture and asks you to isolate all of thehexane that you can from it. After some analysis, you determine that the mixture contains toluene, hexane,benzoic acid, water, sodium chloride, and sand. Explain how you would isolate pure hexane from thismixture. Remember that you can use techniques such as filtration, extractions, and acid/base chemistrythat we learned earlier in this course in addition to distillation. You may need to look up solubilities and/orboiling points online to solve this problem. You only need to isolate the hexane?
- Give good explanation with hand written solution PlzPlease help The petition coeficiente between benzene and water for carta iLife is approximately 3.9 .you are given a 0.35 g sample of acetanilide dissolved in 100ml of water Which of the following extraction techniques will give q better recovery of.acetanilide from water A) one extraction with 60ml of benzene or b) two successive extractions with 30ml portions of benzene? Show calculationHow many grams of % 15 % and 3 % Zinc oxide manufacturing needed for mix ointments to Produce a 135g of % w/ w ointment ?
- (b) Using appropriate chemical reactions for illustration, show how calcium present as the dissolved HCO3- salt in water is easier to remove than other forms of hardness, such as dissolved CaCl2. (c) A water has the following analysis: mg/l mg/l Na+ - 20 Cl- - 40 K+ - 30 HCO3- - 67 Ca2+ - 5 CO32- - 0 Mg2+ - 10 SO42- - 5 Sr2+ -2 NO3- - 10 What is the total hardness, carbonate hardness and noncarbonated hardness in mg/l as CaCO3.1. During fractional distillation, why must we kept the distillate at cool/ low temperature?Which of the ff is not true about recrystallization? a. acetanalide recrystallized only at cold temp b. congo red stain is removed by using animal charcoal c. acetanalide can be dissolved in hot h20