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A solution contains 1.694 mg of CoSO4 (155.0 g/mol) per milliliter. Calculate
(i) the volume of 0.08640 M EDTA needed to titrate a 25.00-mL aliquot of this solution.
(ii) the volume of 0.009450 M Zn2+ needed to titrate the excess reagent after addition of 50.00 mL of 0.008640 M EDTA to a 25.00-mL aliquot of this solution.
(iii) the volume of 0.008640 M EDTA needed to titrate the Zn2+ displaced by Co2+ following addition of an unmeasured excess of ZnY2- to a 25.00-mL aliquot of the CoSO4 solution.
The reaction is Co2+ + ZnY2- CoY2- + Zn2+
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione... better known as luminol, is used by forensic scientists in analyzing crime scenes for the presence of washed-away blood.
How many unpaired electrons will there be in a high-spin octahedral complex of Fe(II)
Calculate the mass of glucose metabolized by a 75.4 kg person in climbing a mountain with an elevation gain of 1370 m. Assume that the work performed in the climb is four times that required to simply lift 75.4 kg by 1370 m.
The density of titanium metal is 4.51 g/cm}^3 at 25 C}. What mass of titanium displaces 69.6 mL of water at 25 ^C?
What are the entropy change and Gibbs energy change on mixing to produce a benzene-toluene solution with 1/3 mole fraction benzene at 25C
Most top-loading balances used in this experiment measure a mass only to the nearest mg(+/- 0.001 g). This significantly affects the calculation of R in the experiment
Write nuclear equations for electron capture by the following radioisotopes. 1. 62/30 Zn 2. 110/50 Sn 3. 40/19 K
if there are 45 drops of alcohol/mL, and the density of alcohol is 0.789g/mL. what is the blood alcohol concentration?
In a chemical reaction 3 moles of one gas and 2 moles of a second gas react to form 5 moles of a third gas. In which of the processes described below should the entropy increase.
A cubic meter of a gravel-and-sand aquifer has been contaminated with 20 L of tetrachloroethylene. If the amount of tetrachloroethylene dissolved in aquifer water is 20 percent of its aqueous solubility,
Draw the structure of a compound c5h8o that reacts with phenyl-hydrazine, decolorizes bromine in dichlorometh, and does not give a positive iodoform test
You are investigating the metabolism of glutamic acid in E coli, which enters the TCA cycle as a-Ketoglutarate following an initial transamination reaction.
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