If you prepare it as a buffer solution to control the pH, is possible to prevent the precipitation of Aluminum Hydroxide from a 0.00452 M Aluminum nitrate solution. Which of the following buffers solutions would not result in the precipitation of Aluminum Hydroxide from this solution
Ksp for Al(OH)3 3.0 x 10-34
Weak Acid Ka
CH3COOH (acetic acid) 1.8 X 10-5
C6H5COOH (benzoic acid) 6.5 x 10-5
C6H5OH (phenol) 1.3 X 10-10
HNO2 (nitrous acid) 4.5 X 10-4
a. 10.0 M CH3COOH with 1.0 M CH3COONa
b. 1.0 M HNO2 with 4.0 M NaNO2
c. 1.0 M HNO2 with 1.0 M NaNO2
d. 1.0 M C6H5COOH (benzoic acid) with 0.25 C6H5COONa
e. 1.0 M CH3CoOH with 1.0 M CH3COONa
f. 2.0 M C6HsOH with 1.32 M KC6HsO
g. 1.0 M C6HsOH with 1.0 M KC6HsC0

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?