The distribution constant for compound A between an organic solvent and water is 65. Calculate the concentration of compound A remaining in the aqueous layer after extraction of 50 mL of a 5 X 10-3 M aqueous solution of compound A with the following quantities of the organic solvent: (a) Two 25 mL portions (b) Four 12.5 mL portions
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- 42.5 mL of 1.3M KOH are required to neutralize 50.0 mL of H2SO4. This sulfuric acid is further used to standardize NaOH solution. 20mL aliquot of the NaOH solution is obtained and 2 drops of phenolphthalein is added. The initial reading on the buret is 13.2 mL. After the titration, the exact normality of the NaOH solution is found to be 1.254N. (a) What is the molarity of H2SO4? (b) How much of the sulfuric acid is used? (c) What is the final reading on the buret?Present clear/readable and full solutions:A 0.8250 g of soda ash sample was dissolved in distilled H O and diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute soda ash solution needed 4.50 mL of 0.1200 M HCl to reach the phenolphthalein end point and 10.00 mL to reach the methyl orange end point. What is the %NaHCO (%w/w) present in the soda ash sample? FW NaHCO = 84.01 g/mol (Hint: Use dilution factor)
- I have a 1.2864g sample of maleic acid which was dissolved in enough water to make 100.0 mL of a solution. Then 10.0 mL of the solution was titrated to a phenolphthalein endpoint with 29.39 mL of an unknown sodium hydroxide solution. What is the molarity of the sodium hydroxide solution?A) What is the concentration of benzene (in ppm) in the original solution? B) What is the concentration of hexane (in ppb) in the original solution?12) Organic chemistry subject, please provide the correct solution for the following.
- How to prepare 100 mL of 10% AlCl3Formulate a hypothesis regarding the solubility of aspirin at different pH.The experimentA) Three teaspoons of water (approx. 15 ml) were added to one tablet said to contain 300 mg of aspirin. Fizzingwas observed. Most of the tablet dissolved, but there were some solid particles. By heating the mug in amicrowave for 10 second increments until the water came to the boil (approx. 3x), all of the solid particlesdissolved. The solution was left to cool to room temperature and then placed in a fridge and NOTHINGHAPPENED. Try this yourself if you can spare two aspirin tablets, your results might look different.• Questions to ask:1. What might the fizzing bubbles be?2. Can you give a chemical explanation?3. Can you write a chemical reaction equation with aspirin reacting with something to give a gas and aspirinin another form?4. What might be the formulation (what the manufacturer mixes with aspirin in making the tablet) “trick”for aspirin to improve solubility?5. How does this compare with…0m205g PBr2 dissolved in 12.5g H2O is considered to be