how to crystallize the solution after obtaining a super cooled solution?( the experiment is about super...
Homework Answers
The solute will naturally start to deposit out of the solution in a super cooled solution. However if we need to recrystallise it, we need to use a seed crystal like alum in the solution which acts like a nucleus around which the solute crystallises.
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how
to crystallize the solution after obtaining a super cooled
solution?( the experiment is about super...
6. (six marks) A saturated solution of KCIO3 is cooled from 50°C to 5°C when it...
6. (six marks) A saturated solution of KCIO3 is cooled from 50°C to 5°C when it is placed into a fridge. Calculate how much potassium chlorate will crystallize from a 1.0-L solution. 8. (five marks) Outline the steps involved in making a diluted acid solution in the lab.
. A solution containing 23 % by mass of sodium phosphate is cooled from 313 to...
. A solution containing 23 % by mass of sodium phosphate is cooled from 313 to 298°K in a Swenson Walker crystallizer to form crystal of Na3PO4.12H20. The solubility of at 2980K is 15.5 kg/100 kg water, and the required product rate of crystal is 0.063kg/s. The mean heat capacity of the solution is 3.2 kJ/kg °K and the heat of crystallization is 146.5kJ/kg. If cooling water enters and leaves at 288 and 293°K, respectively, and the overall coefficient of...
for this experiment of syntheis of aspirin, was the product obtained pure (based on color)? how...
for this experiment of syntheis of aspirin, was the product
obtained pure (based on color)? how do you know? the color was
white
Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also irritants, and all operations in which these substances are used should be carried out under the hood. Prepare a hot-water bath by heating a 400-ml beaker containing about 200 mL of water. 1. Use a centigram balance and...
hello, i need help with the questions in the second photo Experiment 6. the reduction of...
hello, i need help with the questions in the second photo
Experiment 6. the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents....
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent...
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction - (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents. This means that (unlike LAH or Grignard reactions) no separate...
doing experiment about standardization of 0.0025M sodium thiosulphate solution, can someone tell me how this formula...
doing experiment about standardization of 0.0025M
sodium thiosulphate solution,
can someone tell me how this formula (calculating exact conc of
Na2S2o3) (at the bottom) comes ？
Data: (10 marks) Part 1: Standardization of 0.0025M sodium thiosulphate solution No. of drops of 0.0025 M sodium thiosulphate solution Solution Trial 1 Trial 2 Trial 3 Average 1 mL of potassium iodate solution + 0.2 mL 3 M HCI + 1 mL D.I. water + 3 drops of starch 2) 22 121.67 N...
i did the synthesis of aspirin experiment and got the data below. how do you do...
i did the synthesis of aspirin experiment and got the data
below. how do you do the theoretical yield? percent yield of the
pure aspirin?
DATA: Mass of Salicylic Acid: 2.034g Volume of Acetic Anhydride used in synthesis: 4.00ml Mass of filter paper: 0.196g Mass of filter paper plus Aspirin: 1.868g Mass of Aspirin: 1.672g Percent Yield of Pure Aspirin: I Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also...
After obtaining 0.546g of CaCl2, 10mL of 0.3M NaOH the pH of the filtrate was 11.61...
After obtaining 0.546g of CaCl2, 10mL of 0.3M NaOH the pH of the filtrate was 11.61 and the pH of the saturated solution was 11.79. How can I fill an ICE table determining the equilibrium concentrations of Ca2+ and OH for the Ksp of filtrate and saturated solution? (Also, which method should be most accurate)
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled...
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled and put on ice, but no crystals formed. option as the next step to take in the recrystallization procedure in order to obtain pure crystalline material. O A. Remove 60% of the solution by pouring it from the flask. Reheat the solution, cool, and put on ice. O B. Add an additional 25 mL of ether to the solution while on ice. O C....
In the experiment reduction of benzophenone with sodium borohydride, why was the solution heated to boiling...
In the experiment reduction of benzophenone with sodium borohydride, why was the solution heated to boiling after addition of sodium borohydride? why was it added to ice? THANK YOU!!!
6. (six marks) A saturated solution of KCIO3 is cooled from 50°C to 5°C when it is placed into a fridge. Calculate how much potassium chlorate will crystallize from a 1.0-L solution. 8. (five marks) Outline the steps involved in making a diluted acid solution in the lab.
. A solution containing 23 % by mass of sodium phosphate is cooled from 313 to 298°K in a Swenson Walker crystallizer to form crystal of Na3PO4.12H20. The solubility of at 2980K is 15.5 kg/100 kg water, and the required product rate of crystal is 0.063kg/s. The mean heat capacity of the solution is 3.2 kJ/kg °K and the heat of crystallization is 146.5kJ/kg. If cooling water enters and leaves at 288 and 293°K, respectively, and the overall coefficient of...
for this experiment of syntheis of aspirin, was the product
obtained pure (based on color)? how do you know? the color was
white
Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also irritants, and all operations in which these substances are used should be carried out under the hood. Prepare a hot-water bath by heating a 400-ml beaker containing about 200 mL of water. 1. Use a centigram balance and...
hello, i need help with the questions in the second photo
Experiment 6. the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents....
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction - (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents. This means that (unlike LAH or Grignard reactions) no separate...
doing experiment about standardization of 0.0025M
sodium thiosulphate solution,
can someone tell me how this formula (calculating exact conc of
Na2S2o3) (at the bottom) comes ？
Data: (10 marks) Part 1: Standardization of 0.0025M sodium thiosulphate solution No. of drops of 0.0025 M sodium thiosulphate solution Solution Trial 1 Trial 2 Trial 3 Average 1 mL of potassium iodate solution + 0.2 mL 3 M HCI + 1 mL D.I. water + 3 drops of starch 2) 22 121.67 N...
i did the synthesis of aspirin experiment and got the data
below. how do you do the theoretical yield? percent yield of the
pure aspirin?
DATA: Mass of Salicylic Acid: 2.034g Volume of Acetic Anhydride used in synthesis: 4.00ml Mass of filter paper: 0.196g Mass of filter paper plus Aspirin: 1.868g Mass of Aspirin: 1.672g Percent Yield of Pure Aspirin: I Experimental Procedure HAZARD: Sulfuric acid, acetic anhydride and glacial acetic acid are corrosive to the skin. They are also...
After fully dissolving an impure compound in 100 mL of hot ether, the solution was cooled and put on ice, but no crystals formed. option as the next step to take in the recrystallization procedure in order to obtain pure crystalline material. O A. Remove 60% of the solution by pouring it from the flask. Reheat the solution, cool, and put on ice. O B. Add an additional 25 mL of ether to the solution while on ice. O C....
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