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1. Explain what is the minimum volume of boiling water needed to dissolve .2 g of sodium benzoate? The solubility of sodium benzoate in boiling water is one gram per 1.4 mL about explain how much sodium benzoate at 25 C is 1 gram per 1.8mL.
Compute the max mass of solid sodium benzoate that can be recovered when the cooled solution is filtered.
2. Explain why would mixed solvents be used for recrystallization?
3. Define why the melting point of pure phthalic acid is higher than that of pure naphthalene when both have nearly the same weight.
Propose the kinds of attractive forces that might bind congo red to cotton fabric.
when liquid water is introduced into an evacuated vessel at 25c some of the water vaporizes. preshydict how the
CO(g)+2H2(g)->CH3OH(g) How many moles of each reactant are needed to produce 3.60 X 10^2g of CH3OH?
in the alkylation of cyclopentanone better yields are obtained by first reacting cyclopentanone with an equivalent of
Which two hydrogen atoms of salicylic acid are most likely to be acidic? which hydrogen atoms of methyl salicylate would you expect to be acidic
what is the literature value for the Ksp of potassium hydrogen tartrate in water at 10, 22.5, 35, 50 degrees?
What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n=5
The boiling point of a liquid increases as the pressure above the liquid increases. In contrast to boiling food in an open pot, pressure cookers trap the steam, which raises the internal pressure, which raises the boiling point of water, causing a..
The resolution limit of a microscope is approximately equal to the wavelength of light used in producing the image. Electron microscopes utilize an electron beam in place of photons to produce much higher resolution images, about 0.22 nm in modern..
If a buffer is prepared using equal amounts of acetic acid and sodium acetate predict what the pH of the solution will be.
dry air had a co2 mole fraction of 0.00038 in 2007 compared with 0.00032 in 1965. calculate the total mass of co2 that
what number of grams of NaHCO3 in a .210 g piece of antacid would generate 38.0 moles of CO2, if the CO2 is measured at 20 degrees C and 1.00 atm.
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