Why is it important to heat the empty evaporating dish at the beginning of the lab procedure of percentage water in Copper II Sulfate pentahydrate
Q: What would likely happen if a hot saturated solution were filtered by vacuum filtration using a…
A:
Q: Column Chromatography works by the same principle as TLC however the silica gel is not plated on a…
A: Note : Compound A is more soluble in mobile phase. Therefore less polar and having higher Rf.…
Q: In vacuum filtration, the filter paper should be wet before the final product solution is poured…
A: In vacuum filtration, the filter paper should be wet before the final product solution is poured…
Q: Why should the recrystallization solvent have a fairly low boiling point?
A:
Q: What should you do and not do when mixing the organic and aqueous phases during a liquid extraction?…
A: The amount of a substance that moves into the solvent depends on the interaction between substance…
Q: Which of the following is NOT correctly related to the parts of paper chromatography set-up? a.…
A: Paper chromatography is a method for separating dissolved substances from one another. The mobile…
Q: If 50% water : 50% methanol solvent system was used in the chromatographic analysis, the technique…
A: The chromatographic technique which makes use of 50 % water and 50 % methanol as a solvent or a…
Q: Vaccum filtration is the major technique used in this experiment. The following step sequences are…
A: The vacuum filter may be described as the approach which is basically used to disparate the solid…
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: What are the dispersed phase and dispersion medium in milk?
A: Dispersed Phase: The phase or particles which are present in the form of colloidal particles is…
Q: Why acetone has les retention time and toluene has more. discus about polarity of 3 samples and…
A: Retention time is the time how long the compound is inside the Column .Depending on the polarity of…
Q: Why do we use distilled water and not tap water for boiling point elevation experiment?
A: Boiling point elevation occurs when there are dissolved minerals in the water.Distilled water…
Q: When isolating a solid compound after recrystallization, which is the appropriate technique to use,…
A: Recrystallization is an experimental technique of separating pure compound from the solution…
Q: Why does the separation apparatus must be vented after several inversions? to make the stopcock…
A: The mentioned procedure in the question is commonly used technique during extraction.
Q: Why is it not necessary to dry the Erlenmeyer flask between each trial?
A:
Q: Briefly describe on how peptization may occur during washing process of pure compound
A: Peptisation is the process of converting a precipitate into colliodal particles by adding an…
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: Give at least five factors to consider when performing chromatography (paper, thin-layer, liquid,…
A: Chromatography is a technique that is used for the separation of components of a mixture. The…
Q: Why is it necessary to allow enough time for your samples to dry?
A: during the organic synthesis, product may contain the impurity due the presence of the solvent
Q: Why is important to allow the saturated solution to cool down slowly during the recrystallization?
A: Recrystallization is most useful purification technique. It is used for purify solid compounds.
Q: Briefly discuss how to identify the unknown compound by using mixed melting point method.
A: Mixed melting point calculation is a method for the determination of the identity of the unknown…
Q: Which solvent system was used for the recrystallization of acetanilide? O acetone-water 1:2…
A: 1. We must have an basic idea about recrystalization. 2. Recrystalization needs a solvent. 3.…
Q: What effect would the incomplete drying of a sample (e.g., the incomplete removal of a…
A: The melting point will be lowered and broadened.
Q: While performing the formula of hydrate laboratory experiment, the lid accidently slips over the…
A: Percentage hydration can be calculated as follows: where, Mass of water is the mass of water…
Q: Which of the following could DECREASE the amount of the recovered crystals in the purification by…
A:
Q: In liquid, extraction, why is it necessary to turn the separatory funnel upside down and to open the…
A: Liquid-liquid extraction is also called solvent extraction is a method of separating compound from…
Q: 4. When performing a melting point on solid compound using a melting point apparatus, two melting…
A:
Q: In recrystallization, fluted filter paper is used instead of a regular cone because it minimizes its…
A: In recrystallization, an impure solid compound is mixed with hot solvent to form a saturated…
Q: 1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration…
A: A question based on purification, which is to be accomplished.
Q: Why would it be possible to get less than 100% recovery for a recrystallization?
A: The question is based on the concept of recrystallization. recrystallization is a purification…
Q: The phensuprin solid is first dissolved in ethyl acetate. One solid will be left over – what is it?…
A: Phensuprin is the mixture of aspirin or acetyl salicylic acid, acetanilide and sucrose.
Q: Contrast the physical appearance of the crude material before the recrystallization and that of the…
A: A question based on re-crystallization, which is to be accomplished.
Q: SOLVENT SYSTEM DISTANCE SPOTS TRAVELLED, cm 6.4 1.4 1.9 solvent ITSAY 4.1 5.3 6.5 0.7 1.7 2.5 3.0…
A:
Q: for effective purification by recrystalization while avoiding performing a hot gravity filtration,…
A: Recrystallization is used to purify a sample.
Q: Can acetic acid be used as the mobile phase in kool aid chromatography over isopropyl alcohol?
A: Given Can acetic acid be used as the mobile phase in kool aid chromatography over isopropyl alcohol
Q: Why should the washing solvent be cold in the suction filtration step?
A: Suction filtration is the final step for separating the compound from the solution during the…
Q: Which is the most appropriate way to dispense liquid using a dropper (vertical, 45° angle, or…
A: Dropper is a device used to transfer small quantities of liquids.
Q: In your own words, discuss the reason why stray light should be minimized. How does stray light…
A:
Q: "Start the chromatography by adjusting the fraction collector to 130 drops per fraction (about 3…
A: It is given that for 130 drops per fraction it shows volume 3 mL That means volume of 130 drops is 3…
Q: During Buchner filtrati on a portion of the filtrate isused for swirling the resi due into the…
A: SOLUTION: Step 1: A Buchner funnel is a piece of laboratory equipment used in filtration. It is a…
Q: In the second paragraph you should define and describe the process of gas chromatography. In this…
A: A diluted sample in used in gas chromatography because this helps in establishing a proper…
Q: To identify 1° alcohol from 2° alcohol and 2° alcohol from 3° alcohol giving Immiscible layer as the…
A:
Q: What are the benefits of using slightly more solvent than necessary when dissoving a compound for a…
A: Recrystallization is a process of purifying a solute when it is soluble in the solvent only on…
Q: An overachieving student determines that their neutral liquid unknown contains impurities. Suggest…
A: The unknown solution contains liquid and impurities.
Q: What do you think would happen to your recrystallization solution if you did not use a pre- heated…
A: Re-crystallization process is a process in which the compounds which are not soluble in cold solvent…
Q: why do we have to order samples (from least concentrated -most concentrated) when measuring the…
A: A question based on qualitative analysis, which is to be accomplished.
Why is it important to heat the empty evaporating dish at the beginning of the lab procedure of percentage water in Copper II Sulfate pentahydrate
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- fill in the blanks solution volume is 50/1000Which of the following would result in an incorrect value for the density of the acrylic slug using the method of neutral bouyancy. Select all answers that would result in an incorrect value. The student does not calibrate the syringe. A student does not stir the solution before determining if the slug is suspended. They measure the density of the unstirred solution. After stirring, the slug rises to the top of the solution. When measuring the density of the thiosulfate solution in which the acrylic slug is neutrally bouyant, the student accidentally drops some of the solution that is in the syringe before obtaining the mass of the solution in the syringe. A student performs the experiment with the room at a higher temperature than room temperature. All of the reagents are at this higher temperature and the balance has been calibrated at this temperature. Before performing the experiments, students from the previous section leave the…Which statement about liquid-liquid extraction is not correct? * A- A solvent must be available that is miscible with the solution containing the substance to be extracted. B- The solvent used for extraction must have a good ability to dissolve the desired substance. C- The denser solution forms the bottom layer in the extraction funnel. D- The extraction funnel must be vented during the extraction procedure to prevent excessive build-up of pressure inside the extraction funnel. E- All these statements are correct.
- For nonideal solution, like ethanol and water the less volatile component in this mixture has a _____ vapor pressure Group of answer choices chemical less more slightlyCreate a flowchart for the procedures in the determination of water hardness.Give example and explanation of each words: Standard Solution Supernatant liquid Abscissa Atomic mass Concentration Density Equilibrium Constant Formula mass
- The solvent used in recrystallization could be Question 6 options: a mixture of two liquid; a pure solvent; all options are correct;Write the dispersion medium and dispersed phase in milk.How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?
- Accurately weigh out about 6g copper(ii) sulfate crystals into a weighing boat. Use the copper(ii) sulfate crystals to make up 250cm3 of standardized copper (ii) sulfate solution Pipette 25cm3 of this solution into a conical flask Add 1.5g potassium iodide and swirl thoroughly Titrate this solution with standard 0.1 moldm-3 Na2S2O3 in a burette. When the iodine color fades, add 1 cm3 starch indicator. Use your titration data below to calculate the percentage by mass of copper in the copper(ii) sulfate crystals.Fill in the blanks: a) The component of the mixture that becomes a water soluble salt by treating the two component mixture with sodium hydroxide solution has the highest _______________. b) The lower phase in equipment used for liquid-liquid extraction in a water-dichloromethane mixture is_____________, because _______________. c) The component of the mixture that becomes a water-soluble salt is the one with the greatest ______________2. You need to make 500mL of 7H9(+) media with 1X ADN and 30ug/ml. of the antibiotic kanamycin. Your stock solutions are 10X ADN and 30mg/mL of kanamycin. The solvent is distilled water. How much of cach component will you need to make the desired final solution?