Dynamic equilibrium can be defined as rate of dissolution < rate of recrystallization. rate of bubbling > rate of dissolving rate of condensing > rate of bubbling rate of dissolution = rate of recrystallization. rate of dissolution > rate of recrystallization.
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- When dissolving an ionic solid in water, dynamic equilibrium is reached whenGroup of answer choices rate of evaporating < rate of bubbling. rate of dissolution < rate of recrystallization. rate of dissolution > rate of recrystallization. rate of dissolution = rate of recrystallization. rate of condensing > rate of dissolving.For a successful crystallization the following conditions are desired? Agitated vessel O Cold solvent O Stationary (still) vessel O Slow crystal growth Warm solvent Fast solid formation (precipitation)Which of the following statements is true when considering temperature during a recrystallization? More than one answer may be correct. Using ice to cool the sample will speed up the crystallization process so that large crystals will be formed. It is important that the sample is dissolved in just enough hot solvent. O Ideally the hot solvent used will keep the impurities dissolved OR not dissolve them at all. Enough cold solvent should be added to dissolve the sample BEFORE heating it past its boiling point.
- 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.An ideal property of a solvent to be suitable for recrystallization of a solid sample is: Group of answer choices To have a high boiling point. To dissolve the solid at room temperature but not in cold temperature. To react with the solid to be recrystallized. To dissolve the solid at the solvent's boiling temperature but not at room or cold temperature.The solubility of KNO3 at 25°C is 80 g KNO3 / 100g H20. [ Select ] solution a) A solution of 160g KNO3 in 200g of water is a [ Select ] unsaturated saturated supersaturated Stittt J solution b) A solution of 45g KNO3 in 50g of water is a [ Select ] v solution c) A solution of 10g KNO3 in 25g of water is a
- CH3 H CH3 CH;CHCH,CH2OH CH;COH CH;CHCH,CH,OCCH3 + H2O MW 88.15 g/mol density 0.809 g/mL MW 60.05 g/mol density 1.05 g/mL MW 130.19 g/mol density 0.876 g/mL-Lab. II. Freezing point of a pure solid. Data Table. mass of pure naphthaleneo il1.3119 * 2. Freezing (melting ) point of naphthalene10.4 III. Molecular weight by freezing point depression. dEISI Data Table 1. mass of unknown * 2. Freezing (melting ) point of solution 72.3°0 Calculation (Carry out to proper number of significant digits.) 1. AT (difference in freezing points of pure naphthalene and solution) AT= oN awominU 2. molecular weight of unknown solute AT=Kfgmi KP Naph =7.0°Gt molal 7.0°%/molalCorrelate solidification with crystallization(Explanation needed).
- Cyclohexanol 10 ml Mass of cyclohexanol 9.62 g – 0.053 mol Theroretical yield cyclohexene–7.89g - ? mol Therotical mass of cyclohexene- Actual yield- 6.8ml –4.055 g –? mol Percent yield- 51.04% Boiling point of cyclohexene -83 degree Celsius Theroretical boling point -83 degree Celsius can i get some clarification plsBoiling Point Elevation/Freezing Point DepressionT = m KWhere: T = T(solution) - T(pure solvent) * m = (# moles solute / Kg solvent) Kb = boiling point elevation constant. Kf = freezing point depression constant. Kb and Kf depend only on the SOLVENT. Below are some common values. Use these values for the calculations that follow. Solvent Formula Kb (°C / m) Kf (°C / m) Water H2O 0.512 -1.86 Ethanol CH3CH2OH 1.22 -1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 -5.12 Diethyl ether CH3CH2OCH2CH3 2.02 note that ΔT as defined above will be a negative number for freezing point depression. Therefore, Kf must also be given as a negative number.8. Which is the correct order for a recrystallization procedure?a. solvent selection-dissolving-deposition and collection of crystals-filtration-washing-dryingb. solvent selection-dissolving-filtration-deposition and collection of crystals-washing-dryingc. solvent selection-dissolving-deposition and collection of crystals-washing-filtration-dryingd. solvent selection-dissolving-filtration-washing-deposition and collection of crystals-dryinge. solvent selection-filtration-dissolving-deposition and collection of crystals-washing-drying