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Determine a crystallization of sulfanilamide in which 10mL of hot95% ethyl alcohol is added to 0.10 g of impure sulfanilamide. After the solid has dissolved the solution is cooled to room temperature and then placed in an ice-water bath. No crystals form even after scratching with a glass rod. Explicate why this crystallization failed. Explain what would you have to do at this point to make the crystallization work?
Is CCl2H2 polar or non polar. Is CH3OH polar or non polar. Is CH2O polar or non polar. Is H2O polar or nonpolar. Is NH4 polar or non polar.
a chemist has isolated a new natural product and determined its molecular formula to be c24h40o4. in hydrogenation
Which of the following ideal aqueous solutions would be predicted to have the highest osmotic pressure
Assuming equal concentrations, rank these aqueous solutions by their freezing point. SnI4, NaNO3, Al(NO3)3, NaSO4. highest to lowest
What type of HPLC column and detector could be used to separate and detect benzaldehyde and 4-hydroxymethylbenzaldehyde?
A solution is prepared by mixing 52.0 g glucose (C6H12O6) with 510.0 g water. What is the vapor pressure of this solution at 25°C
A different sample of carbon dioxide also contains 27% carbon and 73% oxygen. The percentages are the same for all samples analyzed. Explain these observations with respect to atomic theory.
Zn (s) + 2 HCl (aq) = H2 (g) + ZnCl2 (aq) If 1.26 L of H2 gas are formed at STP, how many g of HCl reacted
the solubility of adipic acid in water is 1.5 g per 100 ml at 15?c and 0.6 g per 100 ml in ether at the same
when the cations Na+ K+ Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? KCL or RbCl, or NaCl or CsCl.
4 HNO3(aq) + Cu(s) => Cu(NO3)2(aq) + 2 H2O(l) + 2 NO2(g) Considering which elements are being oxidized and reduced, determine
benzylamine was titrated with 0.050 0 M HCl. Calculate the pH at the following volumes of added acid: Va = 0, 12.0, 30.0, 0.5 Ve, Ve, and 35.0 mL.
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