Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 19.0 mL of ether.
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- Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute between ether and water is 20, calculate the percent of the compound that can be recovered with a single extraction with 13.3 mL of ether. to two significant figures.Concentration of Acetic Acid in a Vinegar Solution. Average molarity of NaOH Volume HC₂H30₂ sample Final buret reading Initial buret reading Volume NaOH (Show all units and all calculations) Molarity of HC₂H30₂ (unrounded) Average molarity of HC₂H302 (unrounded) Deviations Average deviation Best estimate for molarity of HC₂H302 Average mass percent HC₂H302 46.4mL Oml Ran out of Base ↓ ↓ ↓ ↓ 10.014 HOA je beart giov isults weari?! ferottelucuny Cambia) 10 Kousad Question 1. A Rolaids tablet contains calcium carbonate that neutralizes stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet? CaCO, (s) + 2HCl(aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)A K2SO4 solution is prepared by weighing out a certain amount of the pure solid reagent,dissolving it to 500.0 mL in a volumetric flask. An aliquot was taken from this solution.of 25.00 ml and diluted to 500.0 ml. An aliquot of 5.00 was taken from this new solution anddiluted to 50.00 ml. A chemical analysis of this new solution showed a 0.100%(w/v)in K+. Calculate the weight of the pure solid K2SO4 used for the preparation of the original solution.and its concentration in each volumetric flask. The answer is 2.23x10^2g
- A student prepares a 0.094 M aqueous solution of trimethylacetic acid (C,H,CO,H). Calculate the fraction of trimethylacetic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. %Molecular weight is an example of an additive property of a compound. O True False When non-volatile solute is combined with a volatile solvent, the vapor above the solution is provided solely by the solvent. O True False ●Density of solution:Trial 1: 1.2 g/mLTrial 2: 1.2 g/mLTrial 3: 1.2 g/mL Average density = 1.2 g/mL What is the relative average deviaion, %?
- If the same mass of Na2SO4 (MW: 142 g/mol) and K2SO4 (MW: 174 g/mol) were weighed and used for the gravimetry experiment, which will yield a greater amount of precipitate? Assume that the experiment was done correctly. Indeterminate, it will depend on the (A amount of BaCl2 used. Na „SO, , because it has a smaller В molecular weight. They will yield the same amount of precipitate because the same mass was initially weighed. K,SO, , because it has a larger (D molecular weight. 41. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1500 M CaCh2 Solve for the concentration of the stock solution in M. 2. A 50.00 mL stock CaCl2 solution was diluted with water in a 250.0-mL volumetric flask. A 25.00 mL aliquot of this was further diluted to a final volume of 100.0 mL. Finally, 20.00-mL aliquot of the resulting solution was analyzed and found to contain 0.1200 g CaCl2 Solve for %w/v CaCl2 in the stock solution.The concentration of the "A" solution of propanol is 3.0×10-3 M, using GC method, the height of this peak is 12750 unit. The concentration of etanol in a "B" solution is 7.5×10-3 M, using the same GC method, the height of the peak is 16100 unit in this case. Calculate the concentration and the peak of the compounds, if the mixture of 4 ml A and 6 ml B solution was injected!
- Consider the following scenario: After the first compound elutes off of the column, you collect multiple fractions without seeing the next compound begin to elute. What change might you want to make before you continue taking fractions?Give only typing answer with explanation and conclusion To make a 50 ml 0,05% Tween-20 solution from the stock solution 25% Tween-20. what should be the amount of stock solution you have to use?Q1: What is the density (g/ml) of a 3.6M Sulfuric acid solution that is 29% H,So, by mass (Mwt. = 98)? Q2: Fill the blanks with suitable answers 1: The is the thing being dissolved. ......... 2: The branches of quantitative analysis are and 3. The filterability of the precipitate depend on the of practices. Q3: Which one is correct? 1. Molality changes with temperatures. 2. Molality does not change with temperatures. 3. Molarity changes with temperatures. 4. Normality changes with temperatures. Q4: What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of FeS, =119