Q: What would likely happen if a hot saturated solution were filtered by vacuum filtration using a…
A:
Q: Why was gravity filtration used instead of evaporation to isolate the calcium carbonate?
A: Calcium Carbonate is white, odorless powder or colorless crystals. Practically insoluble in water.…
Q: Why should the recrystallization solvent have a fairly low boiling point?
A:
Q: what would be the implications if the volume reduction is skipped in the recrystallization
A: Recrystallization is a purification technique often employed in the labs. it is based on the…
Q: Explain why a reaction that involves recrystallization as a purification step is unlikely to ever…
A: The process of recrystallization never yields 100% product, because some amount of the product…
Q: After extracting NaOH two times from ether, does the amount of precipitate after adding HCl in both…
A: The acid impurity is removed from the ether (organic layer) using NaOH which converts the insoluble…
Q: What is the purpose of adding HCI to the aqueous layer in this experiment? To remove the impurity To…
A:
Q: 1,4‐Dimethoxybenzene (0.642 g) was dissolved in 2.0 mL acetic acid in a 25 mL Erlenmeyer flask using…
A: The given problem is related to green chemistry. Given: Reactants- Mass of 1,4‐dimethoxybenzene-…
Q: After the drying step (with sodium sulfate), there was still water in the solution. What should the…
A: Topic : use of drying agent (Ex - Sodium Sulfate)
Q: Imagine your original mixture had contained a component capable of sublimation, such as naphthalene.…
A:
Q: Why is there a need to correct conductivity of the sample solution
A:
Q: What is the effect of weighing a recrystallized organic solid which is not completely dried to the…
A: Percentage yield is calculated by dividing actual yield to theoretical yield and multiplying it by…
Q: During heating, some solution of NaCl splattered out of the evaporating dish. How would this affect…
A: Given: During heating, some solution of NaCl splattered out of the evaporating dish.
Q: Why do we know the aqueous layer is the upper layer during the wash steps?
A:
Q: Describe why the inside wall of the flask is rinsed with deionized water during accurate titration.…
A: During accurate titration we need to rinse the inside wall of the flask with de-ionized water…
Q: Why is methanol chosen as the solvent for recrystallization? What would happen if the student uses…
A: Most of the organic compound is dissolved in alcohol like methanol and ethanol . methanol is easy to…
Q: It is tempting to maximize the amount of product isolated by continuing the fractional distillation…
A: The solution is given below -
Q: Why is it not necessary to dry the Erlenmeyer flask between each trial?
A:
Q: How would the concentration be affected if the etched mark on the volumetric flask is missed and too…
A: The concentration of any substance (solute ) in solution is given by, => Concentratio of solute =…
Q: What are in the distillate collected from the distillation?
A: (1) A receiver
Q: 1. Which of the following may cause an increase in the calculated percent recovery of the…
A: Solution: (1) If we use too little solvent, not all of the crystals will dissolve in the hot…
Q: If insoluble impurities eg. dust, tissues, filter paper etc were mixed with the sample how will…
A: Melting Points:- The melting point of a substance is defined as the temperature at which it melts.…
Q: Given 60.00 g of the compound in 60.00 mL water. Calculate amount extracted using multiple (2 x…
A: Concept- In a multiple extraction procedure, a quantity of solvent is used to extract one layer…
Q: Describe the basis of operation of the following separation methods. i. Precipitation ii.…
A: Precipitation, distillation, extraction all are methods to separate components from it's mixture.…
Q: 4. What is the purpose of changing the eluting solvent from pentane to ether between the two…
A: "Since there are multiple questions and it is not mentioned that which one has to be solved so I am…
Q: In a few sentences summarize your results for odor, solubility, acidity and the FeCl3 test for the…
A: Odor= a) rotting garbage smell B) pungent alcoholic C)camphor like D)camphor like
Q: Based on your results, how does rate of crystal growth effect the purity of a recrystallized…
A: When the crystals of any compound are impure due to any reason. They can be recrystallized by the…
Q: is mobile phase the eluting solvent?
A:
Q: what are the clinical significance of (a) sodium nitroprusside test (b) Molisch Test
A: (a) the sodium nitroprusside test is used to determine the presence of ketoacids in the blood and…
Q: What is the purpose of the sodium sulfate? Why did you rinse the sodium sulfate with an additional…
A: Sodium sulphate is used in organic synthesis to remove water via formation of sodium sulphate…
Q: In a few sentences summarize your results for odor, solubility, acidity and the FeCl3 test for the…
A: Every chemical substance has its characteristic smell that helps to identify the compound.…
Q: If some t-butanol were lost between after it's weighed in before the first run, how would the…
A: It is given that some t-butanol was lost between after its weight in before the first run.
Q: Draw an extraction flow chart for the extraction of a mixture of organic acid and phenol.
A: In this question we have been provided with a mixture of Organic acid and phenol, now we need to…
Q: Purification of benzoic acid 1. What is the purpose of washing the crystal in the filter paper with…
A: 1) Answer: Benzoic acid is prepared from toluene industrially. Toluene is react with cl2 gas under…
Q: One of the components of nutmeg is an organic compound, Trimiristin, A. To extract this compound…
A: One of the components of nutmeg is an organic compound, Trimiristin, A. To extract this compound…
Q: What are the common faults in the Water distiller instrument?
A: You'll need to clean the boiling chamber on a regular basis to maintain your water distiller running…
Q: Why is the titration done with vigorous swirling?
A: Titration is the process of chemical analysis where the quantity of some constituent of sample is…
Q: Briefly explain why should the flask be stoppered after the addition of KI in the standardization of…
A: The standardization of thiosulfate involves the oxidation of sodium thiosulfate to form sodium…
Q: A crude nonacidic product mixture dissolved in diethyl ether contains acetic acid. Describe an…
A: We have a crude non acidic product mixture dissolved in diethyl ether contains acetic acid. We have…
Q: Why is there a need to immediately titrate the sample solution with the standard sodium thiosulfate…
A: Titration is a method of quantitative analysis in order to determine the concentration of an unknown…
Q: which procedure will produce 200ml of a solution that is 2.5%by volume alcohol of water?
A: The percentage by volume of the solution is 2.5 %. The V/V % can be calculated by the following…
Q: For this chemistry problem, I am stuck on what the reactants and products are in order to determine…
A: (a)Product A is Cu(NO3)2 and it reacts with NaOH giving Cu(OH)2. The reaction between Cu(NO3)2 and…
Q: Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture.
A: Preparation of Isopentyl acetate is done by the reaction of isopentyl alcohol and acetic acid in…
Q: Under what conditions can a good separation be achieved with a simple distillation?
A: Simple distillation is a method of separating two compounds from a mixture on the basis of their…
Q: If insoluble impurities, e.g., dust, tissue, filter paper, etc., were mixed with the sample, how…
A: Insoluble impurities The term "insoluble impurities" refers to contaminants that settle or float on…
Q: Write all the steps of recrystallization of impure naphthalene from methanol. How to identify the…
A: In this question, we have to find out the correct answer of given problem by the help of…
Q: How to get potassium hydroxide from potassium iodide? Give a detailed explanation of the methods…
A: Interpretation- Give the explanation of method used in the process of sepration that how to get…
Q: Based on the resulting chromatograms after visualization with iodine vapor, which between the…
A: A question based on purification, which is to be accomplished.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- 3. When solid sodium bicarbonate and solid hydrochloric acid were mixed together, no change was observed. When water was added to the solid mixture, bubbles formed. Explain these results.Explain how you could separate an equimolar mixture of Compound X, Y and Z. (a flow chart). NH2 画 HO. Compound X Compound Y Compound ZBriefly describe the principles for separating the components of a mixture by solvent extraction.
- Please answer this question as fast as you can please and tahnk you. I will afterwards write an wonderful review on solving the question. Thank you. Why is it important for us to leave the water for 5 minutes and determine the water's temperature? The density of water will vary with temperature. You want the water to equilibrate to room temperature in order to maintain consistent results. You want to wait so that the dissolved solids in the water settle to the bottom of the flask. It is impossible to determine the density of water below 20 °C with plastic beakers and cylinders so you need to wait for the water to warm up. It's not that important, we just want to stretch out the time of the experiment.What is the reason for returning the calcium carbonate precipitate to the oven until it reaches a constant mass?2. When performing the recrystallization of an impure solid, why is it advised to use the minimal amount of solvent possible? Group of answer choices To minimize the amount of pure solid lost due to its solubility. To minimize the cost of the recrystallization. To reduce the time needed to filter the pure solid from the solvent after recrystallization. To minimize the amount of hazardous materials used.
- 6. During the recrystallization procedure, a two-solvent system is used. What is a two-solvent system. Explain why two-solvent systems are used in recrystallization.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…Draw an outline of the recrystallization process- Assume all types of Impurities(Soluble, Insoluble and colored) are present.
- 6. What are the factors affect that decrease the percent yield during a recrystallization?In a mixed solvent system, what is the role of the "poor" solvent? a.to DECREASE the solubility of the solute in the good solvent and saturate the solution b. to INCREASE the solubility of the solute in the good solvent and saturate the solution c. to DECREASE the boiling point of the mixtureOne way to increase the solubility of an insoluble salt is to increase the ionic strength of the solution. stir the solution vigorously. decrease the ionic strength of the solution. add more of the insoluble salt to the solution.