If you are performing a solvent extraction using 1M NaHCO3 and Dichloromethane (Density = 1.325 g/mL) which layer will be the aqueous layer? Top or bottom layer?
Q: Decide how the compounds below will partition during liquid-liquid extraction of water with an…
A: Polar compounds soluble in polar solvents( H2O) Non polar compounds soluble in non polar solvents
Q: ) Which technique would be best to determine the amount of nitrate in drinking water? Select one.…
A: Answer of 1 and 2 :
Q: The volume of hydrochloric acid required to prepare an approximate solution of 0.2 normal…
A: The question is based on the concept of solution preparation. we have been given a stock solution of…
Q: Is recrystallization a good method for purifying any product?
A:
Q: Ratio of peppermint water to make 60ml? What is the stepwise procedure for preparation of…
A:
Q: 8. Why should you boil the sample solution right before reaching the end point?
A:
Q: is water a good solvent for recrystallization for acetanilide based on the image?
A: The answer is as follows:
Q: Make a Flow chart diagram of the PROCESS OF RECRYSTALLIZATION
A: Recrystallization is characterized as the interaction in which grains of a crystal structure arrive…
Q: 4. Explain why aspirin is more soluble in ethanol than in water. For either of these solvents…
A: The basic rule of solubility is like dissolves like i.e., polar solvent will dissolve polar solute…
Q: Saturating the aqueous phase by adding a salt such as Na2CO3 is called: Select one: O a. Emulsion O…
A: Given: Saturating the aqueous phase by Na2CO3 To find: Role of sodium carbonate in above process…
Q: How much of a 26.0 M hydrochloric acid solution would you dilute to prepare 50.00 mL of 5.00 MM…
A: Dilution Dilution process is the process to change (decrease) the concentration of solution in…
Q: How many grams of % 15 % and 3 % Zinc oxide manufacturing needed for mix ointments to Produce a 135g…
A: Percentage mass or weight (%W/W) can be calculated by using Following formula - Percentage weight =…
Q: Determine the final concentration of a solution made by diluting 3.00 mL of an 8.00 x 10-5 M blue…
A: M1V1=M2V2 M=molarity V=volume
Q: Whichof the following would not be a good solvent to use to extract a sample from water? hexane…
A:
Q: How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).
A: "Since there are multiple questions and it is not mentioned that which one has to be solved so I am…
Q: How do I create a detailed separations flowchart of the isolation process of caffeine from soda? The…
A: One of the separation processes that is used to isolate a particular compound from mixture or a…
Q: What are the criteria for a good recrystallization solvent?
A: Recrystallization refers to the phenomenon where solid compounds are purified. In the…
Q: Q. 4. How the reflux can be used for the purification and recovery of organic solvents?
A: See answer below
Q: How many mL 12.0M nitric acid are needed to make 625mL 0.11M nitric acid?
A:
Q: What was the concentration of my stock solution if I used 26mL of it to make 116ml of a 1.5 M…
A: Given that, V1= 26 mL , M1=? V2=116 mL , M2= 1.5 M
Q: How to prepare 0.10M of sodium thiosulphate
A: Given that molarity of sodium thiosulphate (Na2S2O3)is 0.10 M Molar mass of Na2S2O3 is 158.11 g/mol
Q: Show how to take 3.6E-7 mol/L AgCl and convert it to g/100 mL
A: Given: 3.6 x 10-7 mol/L AgCl To convert: 3.6 x 10-7 mol/L AgCl to g/100 mL AgCl conversion…
Q: Describe how to prepare exactly 100 mL of 1.00 M HCl from 12.1 M HCl reagent.
A: Concentration or Molarity is defined as “the mole of the solute per unit volume of the solution”. It…
Q: Preparation and Standardization of 0.1 N lodine Solution Preparation 1. Dissolve 14 g of iodine in a…
A: As in As2O3 is undergoing oxidation to Na3AsO4. I in I2 is undergoing reduction to form NaI.
Q: Describe how to create a 3.0 mL sample with concentration of 1.5 x 10-4 M from a starting stock…
A: Dilution Dilution process is the process to change (decrease) the concentration of solution in…
Q: In distillation 1. What is the reason for discouraging the formation of bubbles inside the…
A: Distillation is a method of separating components present in a liquid mixture based on difference in…
Q: 1. How did the temperature change throughout the experiment? Use relative terms like increase,…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: How much of the suspending agent is needed to prepare a 60-mL preparation of Aluminum hydroxide gel…
A:
Q: What volume of concentrated HCl (12.1 M) is needed to prepare 100.0 mL 0.750 M HCl? Select one:…
A: Given, The volume of 12.1 M HCl is required to prepare 100.0 mL of 0.750 M HCl is:
Q: How much sterile water will you have to add to the concentrated solution you calculated from problem…
A: The question is based on the concept of solutions. Molarity is a method of expressing…
Q: Write the Separation of heavy metals using solvent extraction technique.
A: Solvent extraction is an analytical method in which metals are separated based on their solubility…
Q: How many milliliters of 15.7% (v/v) acetic acid would you need to use to get 39 milliliters of…
A: Given-> (V/V)% = 15.7 % Volume of acetic acid solution = 39 millilitres
Q: From the graph of temperature vs. volume data from a fractional distillation of 100 mL…
A: Fractional distillation It is the separation technique used for miscible liquids. It involves the…
Q: From the graph of temperature vs. volume data from a fractional distillation of 100 mL…
A: Methanol and water fractional distillation is an analytical process used to separate compounds such…
Q: 2. During heating, some solution of NaCl spattered out of the evaporating dish. How would this…
A: The question is based on the concept of experimental chemistry. We have to evaluate the impact of…
Q: How to prepare 1.10M of sodium thiosulphate
A: Given ,molarity of sodium thiosulphate is 1.10M
Q: What volume of 30% H202 do you have to dilute to make 20 mL to make a 3% H20 solution ?
A: Given , Concentration of stock solution of H2O2 = 30 % ( I am taking 3% H20 solution as 3% H2O2…
Q: Why is it important to cool slowly during recrystallization
A: recrystallization is a process in which we dissolve an impure crystal in a solvent at high…
Q: What will be the soufflé’s volume after cooking? Show complete solution
A: The pressure of the soufflé’s batter remains same and we need to relate the volume change of gas…
Q: What two ionic compounds are dissolved in the filtrate after the suction filtration step What two…
A: The above reaction is an example of double displacement reaction and a well known procedure for…
Q: Which of the following best describes a deep euctectic solvent? It is a solvent with various mixture…
A: A question based on solution that is to be accomplished.
Q: Upon adding 400 mL of 1.0 M HI to 400 mL of 1.0 M C5H5N
A: This is the acid base reaction .
Q: Describe the characteristics that a crystal obtained through recrystallization must have, the final…
A: Recrystallization is basically a purification technique. Recrystallization is a process in which the…
Q: Determine the volume of dilute HNO3 (d= 1.11 g/mL and 19% pure) that can be prepared by diluting 50…
A: Interpretation - To determine the volume of dilute HNO3 (d= 1.11 g/mL and 19% pure) that can be…
Q: To identify 1° alcohol from 2° alcohol and 2° alcohol from 3° alcohol giving Immiscible layer as the…
A:
Q: How would you make a 1 mL 0.8% Tween-20 solution in PBS from a 10% stock solution?
A: Tween-20 is polysorbate 20 with molecular formula C58H114O26 Its molecular weight is 1226g/mol…
Q: if i want to dilute 30 L ofa 1.5 M FeSO4 solution to a 0.3 M FeSO4 solution how much of the solvent…
A: Initial volume = 30 L Initial molarity = 1.5 M New molarity = 0.3 M New volume = ?
Q: 10 mL of a liquid composed only of carbon and hydrogen is added to a separatory funnel containing…
A: Compound has only carbon and hydrogen.
If you are performing a solvent extraction using 1M NaHCO3 and Dichloromethane (Density = 1.325 g/mL) which layer will be the aqueous layer? Top or bottom layer?
Step by step
Solved in 2 steps
- Will a ppt of SrF2 form if you mix 6.6 x 10-2 M Sr(NO3)2 (aq) with 9.8 x 10-6 M NaF (aq)? (Which of the following is entirely correct?) Q = 6.5 x 107, ppt forms OQ = 2.5 x 10-11, no ppt Q = 6.3 x 10-12, no ppt %3D OQ = 6.3 x 1012, ppt forms O Q = 6.5 x 107, n o pptProcedure A: Molarity (M=g/MM/L) Step 1. Place one-eighth of a teaspoon (this weighs approximately 0.5 grams) of NaCl (table salt) in the graduated cylinder provided. Then add distilled water to that graduated cylinder until the level of the water reaches 45.00 mL. Mix thoroughly about 1 minute. Pour solution into a somewhat clear cup. Remember what this looks like for Procedure B. Questions: Is this a saturated solution? Why or why not? Take a picture and insert a picture (compress your image) of your solution here. Save this solution for Step 2. Calculations: Determine the Molarity of this solution using the formula M = g/MM/L. You know the grams (one-eighth of a teaspoon weighs approximately 0.5 grams), look up the Molar Mass of NaCl, and convert your mL to L to solve the problem.) Show your calculations for Molarity here. C % 31 D < hp & * ✔Rinse and fill the buret with 0.100 M HCl solution. Transfer accurately 25.0 mL of saturated calcium hydroxide solution (2g of calcium hydroxide per 100 ml of water) into two separate E-flasks. Add 2 drops of phenolphthalein to each flask and titrate each solution until the pink color disappears. Voume of HCl used: Trial 1= 6.80ml; Trial 2 = 6.30mL Determination of solubility and Ksp of calcium hydroxide 2. Compute for the moles of H+ used and the moles of OH- present. moles of H+ used = (concentration of HCl) × (volume of HCl used)moles of OH- = moles of H+ used 3. Construct an ICE table for the reaction.4. Calculate the molar solubility (in mol/L) of OH- and Ca2+.5. Determine the solubility of Ca(OH)2 in g/L. (MM of Ca(OH)2 = 74.096 g/mol)6. Calculate the Ksp of Ca(OH)2.7. Compute for the percent error of the experimental value for Ksp of Ca(OH)2 with the literature value.(Ksp of Ca(OH)2 = 8.0 × 10-6 at 25°C)
- In a test tube, dissolve 10 drops of methanol in 3 ml. of water. Oxidize a copper wire spiral by passing it through a Bunsen burner. Plunge the red-hot wire into the alcohol solution several times, cooling the solution under the tap (faucet) so as not to evaporate too much of it. Next, add 1 drop of 0.5% resorcinol solution. Measure 2 ml. of concentrated sulfuric acid (CAUTION!) and pour this carefully down the sides of the test tube containing the mixture. Note the color of the zone intermediate between the acid and the solution. RESULT:How much of the preservative is needed to prepare a 120-mL preparation of Aluminum hydroxide gel based on this formulation? Ammonium alum 800 g Sodium carbonate 1000g Peppermint Oil 0.01% (0.01 g/100mL) Sodium benzoate 0.1% (0.1 g/100mL) Purified water, qs ad.2000 mL a. 0.12 g b. 60 g c. 48 g d. 0.012 gPreparation of a standard solution of copper(II) sulfate pentahydrate 1. Weigh out accurately 9.99 g of copper(II) sulfate pentahydrate (CuSO4·5H2O) by taring using a clean and dry empty 250-ml beaker. 2. Add tap water to the beaker to reach the 50-mL mark on the side of the beaker. 3. Dissolve all the crystals of CuSO4·5H2O in the water using a clean glass rod for stirring. 4. Then using a glass funnel transfer all the blue solution to a 100-mL volumetric flask. Rinse the beaker with about 10 mL of water and transfer the solution to the volumetric flask. Repeat the rinsing of the beaker with another 10 mL of water and transfer the solution to the volumetric flask. This is called quantitative transfer of the solution. 5. Then add enough water to reach the calibration mark of the volumetric flask. (You will need to use a dropper to add the last few drops of water to ensure the meniscus is on the calibration mark). Close the volumetric flask with a stopper and mix the solution well (so…
- convert 0.71 mg/ml of 4-methoxyphenyl acetate to mmol/ml and determine the percentage purityA reagent bottle contains 250 cm3 of 0,4 mol.dm–3 oxalic acid(C2O4H2) solution. Calculate the mass of pure oxalic acid thatmust be dissolved in this solution so that its new concentration is 0,6 mol.dm–3. Assume that the volume of the solution remainsconstantCI concentrated X 1. LIAIH₁ 2. H₂O* NaOH 0°C
- Materials Needed solid I2 solid CUSO4-5H20 food dye solid (NH4)2SO4 heavy metals waste container halogenated waste container non-halogenated waste container semi-micro test tubes and rack regular test tubes and rack squash pipettes acetone cyclohexane propan-2-ol Method Part A: Solubility of ionic and molecular solids 1. Place a small amount (about the size of 1 grain of rice, see picture) of copper sulfate into each of three DRY semi-micro test tubes. Add 20 drops of water to the first test tube and gently flick the test tube with your finger to ensure mixing. 2. Repeat step 1 using acetone in place of water as the solvent in the second test tube. 3. Repeat step 2 replacing acetone with cyclohexane in the third test tube. Hold the test tubes against a white background to compare the solubility of copper sulfate in the three solvents and record your results. Discard these mixtures into the heavy metals waste container in the fume cupboard. Once these test tubes have been emptied you…Part IV. Preparation of 100 mL 25% Solution X Materials: Solution X, measuring cylinder, distilled water, and parafilm. Show calculation steps. (1) Calculate the volume of Solution X required. (2) Calculate the volume of distilled water required_ (3) Deliver the calculated amount of distilled water in the measuring cylinder. (4) Add the calculated amount of Solution X to the measuring cylinder. (5) Seal the opening of the measuring cylinder with parafilm. Mix well. (6) Transfer the prepared 25% Solution X into a labelled container.Which of the solvents given below will boil first? ethanal = 120.26 KPa ethanoic acid= 1.94 KPa