Gelato

PORT MMARY Mass or cyclohexane collected (g) Vapor temperature when distillation of toluene started: 111.0 °C Vapor temperature when distillation of toluene finished: 112.0 °C Volume of toluene collected: 13.2 mL 0.867 g/mL Density of toluene collected: Amount of toluene collected in grams what is the percentage by mass of cyclohexane in the mixture? What is the percentage by mass of toluene in the mixture? (1nte) tua LabS + 8.0 $ R F4 T Fo & 7 F7 U 00 8 DII FB 1 ( 9 F9 O ) O F10 P 13.2 Soliz, Diamond diamond5@nmsu.edu

At 0 oC, the solubility of sodium acetate in water is 36.1 g per 100 g of water and at 40 oC, the solubility is 66.4 g per 100 g of water. A 100 g sample of sodium acetate is dissolved in 250 g of water at 40 °C. The solution is cooled to 0 °C and a small amount of solid is observed. This solution is ________. - hydrated -saturated -supersaturated - unsaturated

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.

b) Will the sample be contaminated with any of the impurities? Calculate the percent purity of the initial sample (in terms of compound A) - ( i.e. express the amount of compound A in the initial sample as a percentage of the mass of initial sample). Calculate the percent purity of the final sample (in terms of compound A) - (i.e. express the amount of compound A in the final sample as a percentage of the mass of final sample). Did the recrystallization procedure result in an increase of the percent purity of compound A in the sample? Comment on the results.

How do fill in the Flow Diagram for the Mixtures using the information presented?

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. The solution was heated by burning natural gas in a Bunsen burner to distill the ethanol that formed in the flask. During the distillation, the ethanol evaporated and then condensed in the receiving flask. The flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. During this experiment the following changes occurred. Which of these changes involved a physical change and not a chemical change? formation of a carbon deposit inside the flaskevaporation of ethanolformation of ethanol from glucose by yeastburning of natural gascondensation of ethanolformation of carbon dioxide gas from glucose

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. The solution was heated by burning natural gas in a Bunsen burner to distill the ethanol that formed in the flask. During the distillation, the ethanol evaporated and then condensed in the receiving flask. The flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. During this experiment the following changes occurred. Which of these changes involved a physical change and not a chemical change? Check all that apply. • View Available Hint(s) formation of a carbon deposit inside the flask O burning of natural gas formation of carbon dioxide gas from glucose condensation of ethanol formation of ethanol from glucose by yeast evaporation of ethanol