When choosing a pair of solvents for a mixed-solvent recrystallization, what factor is most important? Group of answer choices a)The miscibility of the solvents. b)The similar size/molar mass of the solvents.
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- What property does the separating funnel exploit for separation? A. Size b. miscibility c. volatility d. SolubilityFor results/conclusions Using the images attached Write 2 paragraphs 1st paragraph: Starts with Objective. Results of DeltaT and i stated 2nd paragraph: sources of errors discussed The objective is The colligative properties are the properties that undergo a change when a solute is introduced to a solvent. Freezing point depression is also a colligative property. The addition of a solute to a solvent reduces the freezing point of the resulting solution. The freezing point of the solution is always lower than the freezing point of the solvent. This difference in the freezing point between solvent and solution is called freezing point depression. The freezing point depression is directly proportional to the molality of the solution or the number of moles of solute present in the solution.An ideal solvent to use for recrystallization is one that: Group of answer choices dissolves the desired compound in ice-cold water temperature but does not dissolve the desired compound at its boiling temperature. a solvent in which the desired compound dissolves at any temperature. a solvent that reacts with the desired compound. dissolves the desired compound at its boiling temperature but does not dissolve the desired compound in ice-cold temperature.
- 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.Extraction is the process by which a solute is separated from a solution using a solvent that is miscible to the first solvent. In this process, the solute dissolved in the solvent which is extracted due to its reaction to the second solvent where the solute is more soluble. True FalseWhy is potassium hydrogen phthalate (KHP) used to standardize the NaOH solution instead of measuring out a known mass of solid NaOH to be dissolved in water? KHP is an acid and will neutralize some of the NaOH to use later. O There is no reason, NaOH solutions can be used without standardization. O Solid NaOH is hygroscopic and will absorb water, making it virtually impossible to determine a true initial mass and therefore changing the concentration of the solution. Solid NaOH evaporates therefore its concentration can never be known.
- Which of the following solvent systems are not suitable for binary solvent recrystallization? |water and heptane water and ethanol water and toluene water and methanolGiven these values, find the initial mole fraction and initial mass % of the solute (sucrose) Solvent (water) weight: 200g Solute (NaCl) weight: 232g Solute (NaCl) Molar mass=342.3 moles of solute (NaCl) = .678How do we keep relative supersaturation low by controlling solubility? solubility should be higher solubility should be constant solubility should be lower solubility should be fluctuating
- (c) Are the strengths of the interactions between the particles in the solute and between the particles in the solvent before the solute and solvent are combined greater than, less than, or equal to the strengths of the interactions between solute particles and solvent particles after dissolution? Explain.A sodium sulfate solution is measured at 2.2 molal in pure water at a source company. (sodium sulfate molar mass = 142.05 g mol) The lab needs to report the concentration in molarity. What is the final molarity of the sodium sulfate solution? (density of water = 1.0 g mL¯' ; density of the solution = 1.2 g uestion 4 %3D mL-1). (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3) Question 4 of 29> AMoving to another question will save this response. 888. P11 64 F12 eIC " 24 4 & 7\ 3 5 6. 8. %3D dele E R T Y A S D L F G K Z C N alt alt option command command optionA standard solution is prepared by diluting the stock solution and used in chemical analysis for preparing the standard curve. Larutan piawai disediakan dengan melakukan pencairan larutan stok dan digunakan dalam analisis kimia untuk penyediaan lengkuk piawai. A) Illustrate how do you prepare a stock solution of 0.01 g of NaNO2 in one liter of distilled water in laboratory.