2. A student performs a separation mixture and obtains the following data: Mass (g) 75.254 g 80.524 g 77.350 g 76.850 g Calculate the experimentally determined percentage of salt in the mixture? Show your work. Description Empty 150-mL beaker 150-mL beaker + mixture 150-mL beaker + salt 150-mL beaker + sand mass of comропеnt mass % = х 100% mass of mixture

2. A student performs a separation mixture and obtains the following data: Mass (g) 75.254 g 80.524 g 77.350 g 76.850 g Calculate the experimentally determined percentage of salt in the mixture? Show your work. Description Empty 150-mL beaker 150-mL beaker + mixture 150-mL beaker + salt 150-mL beaker + sand mass of comропеnt mass % = х 100% mass of mixture

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter20: Nucleophilic Substitution Reactions: Competing Nucleophiles

Section: Chapter Questions

Problem 8Q

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Calculate the Standardized Molarity of NaOH via dimensional analysis. Show your process.Use this table in answering the Standardized Molarity of NaOH in Trials 1, 2, and 3. TRIALS 1 2 3 Actual weight of Std. KHP (g) 0.8026 0.8032 0.8021 Corrected weight of KHP (g) based on % purity of primary std. 0.7986g 0.7992g 0.7981g Volume NaOH used (ml) 39.45 39.35 39.47
10. A 150.0mL sample of salt water is evaporated to dryness. A residue of salt weighing 27.9g is left behind. Calculate the percent mass/volume of the original salt water sample. 11. A solution is made by dissolving 0.900g of salt in 100.0mL of water. Assume that each milliliter of water weights 1.00g and that the final solution volume is 100.0mL. Calculate the %mass and %mass/volume for the solution.
A solution of common salt in water is prepared by adding 50kg of salt to 200kg of water tomake a liquid density of 1250kg/m3. Calculate the concentration of salt in this solution as a: i) Weight(w/w)fraction (Ans: weight fraction 20%)
50 mg of granular salt is briefly stirred into a glass container of 1/5 liter volume filled with water. After briefly mixing, some salt is still seen at the bottom of the class. The visible salt is filtered from the water, weighed and determined to have a mass of 20 mg. What is the dissolved phase concentration of salt remaining in the water? Provide your answer to the nearest whole number in units of mg/l.
No plagiarism please! 11. Describe a method to separate salt from a homogeneous mixture of salt water so that it is in the form of a solid at the end of the separation process.
I would need help with these questions. The method referenced above was followed by a student and she got the following results: Caffeine Std. Conc. (ppm) Absorbance 100 1.806 50 0.899 40 0.724 30 0.545 20 0.365 10 0.183 Further, she analyzed an unknown sample and she got the following results: Sample # Absorbance 1 0.398 1. Graphically find the concentration in ppm and then calculate in mol/L of Caffeine in Sample #1? 2. Which solvent was used to extract Caffeine and why? Why is it necessary to do extraction three times? 3. Cuvettes used in this experiment were made from which material and why? 4. At what wavelength the Absorbance was measured?
A tank initially contains 200 liters of fresh water. Brine containing 2.5 N/liter of dissolved salt runs into the tank at the rate of 8 liters/min and the mixture kept uniform by stirring runs out at the the same rate. How long (in minutes) will it take for the quantity of salt in the tank to be 180 N?
Determine the percentage Fe in a sample of limonite from the following data:Sample : 0.5000g ; KMnO4 used = 50.00 ml ; 1.000ml of KMnO4 is equivalent 0.005317 g Fe,FeSO4 used = 6.00 ml; 1.000ml FeSO4 is equivalent 0.009200 g FeO ( ans 44.59 %)
A solution of potassium phosphate contains a mixture of 164 mg of monobasic potassium phosphate (MWt: 136) and 158 mg of dibasic potassium phosphate (MWt: 174) per milliliter. If a hyperalimentation fluid calls for the addition of 45 mEq of potassium, how many milliliters of the solution should be used to provide this level of potassium? How many millimoles of total phosphate will be represented in the calculated volume of potassium phosphate solution?
The %purity of a powdered crude sample of Na2CO3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. a. How many moles of CO2 were collected? b. What is the percent purity of the sample? Round off to the nearest whole number
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Pls do fast within 5 minutes and i will give like for sure Solution must be in typed form To plan a liquid–liquid extraction we need to know the solute’s distribution ratio between the two phases. One approach is to carry out the extraction on a solution that contains a known amount of solute. After the extraction, we isolate the organic phase and allow it to evaporate, leaving behind the solute. In one such experiment, 1.235 g of a solute with a molar mass of 117.3 g/mol is dissolved in 10.00 mL of water. After extracting with 5.00 mL of toluene, 0.889 g of the solute is recovered in the organic phase. If we extract 20.00 mL of an aqueous solution that contains the solute using 10.00 mL of toluene, what is the extraction efficiency?