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IF a black precipitate remaining from the separation of Cr3+ as well as Fe2+ ions from Ni2+ ion is dissolved in HCl and HNO3. A few NH3 is added, followed by several drops of dimethylglyoxime.
(1) Explain a colorless solution results.
(2) Define what might have gone wrong?
Calculate the freezing and boiling point of the following solutions, assuming complete dissociation. a. 12.0 g FeCl3 in 162 g water
a solution is prepared by adding 1.91 mg of an unknown protein to enough water to make a 12.7 ml solution. the osmotic
An oxidation-reduction reaction in which 3 electrons are transferred has a deltaG(standard)=+18.55 kJ at 25 C. What is the value of E(standard)
Aniline () is an organic base used in the manufacture of dyes. Calculate the in a 0.12 solution of aniline ().
Comment on the following observation: in its complexes, Co(III) forms strong bonds to O- and N- donor ligands, moderately strong bonds to P- donor ligands
Sodium sulfate dissolves as follows: Na2SO4(s) 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of solution in which the Na concentration is 0.10 M.
What mass (in grams) of solid Na2SO4 would need to be added to 250 grams of water to make an ideal solution with a boiling point of 103.6°C. (Kb for water is 0.512°C/m)
The half-life of 32P is 14.3 days. If you begin with 4.9 ?g (micrograms) of radioactive 32P in the form of Na2HPO4, what mass remains after 28.6 days (about one month)
What is the final pressure (atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final volume of 3.00 L at 273 K
An ether and an alkene are formed as by products in n-butyl bromide synthesis. Draw the structures and mechanism for their formation
calculate concentration of chromate ion (CrO4) in a 0450 M solution of chromic acid (H2CrO4). (for chromic acid, Ka = .18, Ka2 = 3.2 x 10E-7)
The reaction of nitrogen dioxide with carbon monoxide NO2 + CO NO + CO2 is second order in NO2 and zero order in CO. Complete the rate law for this reaction in the box below
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