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Suppose you want to measure the iron content of a sample of water run-off. A 25.0 mL sample was acidified with nitric acid and then treated with excess KSCN to form a red complex that can be analyzed with spectroscopy. The solution was then diluted to 100.0 mL and placed in a cuvet with a path length of 2.48 cm. For comparison, a 10.0 mL reference sample of 6.80 x 10-4 M Fe3+ was also treated with nitric acid and KSCN and diluted to 50.0 mL and placed in a cuvet with a 1.00 cm path length. If both solutions gave the same abs value, what was the concentration of iron in the water run-off sample?The answer should be: 2.19 x 10^-4 M
Question 1 (Multiple Choice Worth 2 points) If 2.0 liters of oxygen gas react with excess carbon monoxide at 273 K and 1.00 atm, how many liters of carbon dioxide can be produced under the same conditions? 2 CO (g) + O2 (g) yields 2 CO2 (g) 1.0 L 2.0..
What is the FORMULA for the limiting reagent?
how many grams of sodium lactate should be added to 1.00 l of 0.150 lactic acid or to form a buffer solution with
water flowing through pipes of carbon steel must be kept at PH 5 or greater than limit corrosion if an 8.0 *10^3 Ib/hr water stream contains 10 ppm sulfuric acid and 0.015% acetic acid, how many pounds per hour of sodium acetate trihedrate
Complete as well as balance the displayed half reaction in acidic aqueous solution taking into account the electrons
what is the standard-state heat of reaction for the dissociation of dinitrogen tetroxide b.) determine the equilibrium composition of this mixture of 50C and 0.1, 1, and 10 bar. c.) repeat the calculation at 200C
Describe how you would prepare each of the following aqueous solutions. - 230 g of a solution that is 0.60 molal in Na2CO3 starting with the solid solute. - 1.30 L of a solution that is 18.0% Pb(NO3)2 by mass. (density = 1.16 g/mL)
volumetric flask dissolved with distilled water and then diluted to the mark with distilled water. 10.0mL of this solution is transferred to a 100mL volumetric flask and diluted to the mark with distilled water. Calculate the molarity of the solut..
compute the energy released by the combustion of octane, C8H18 as well as the maximum expansion work that can be performed by octane combustion at 298 K in an isothermal reversible pistion engine.
Calculate the mass of water produced when 5.41 g of butane reacts with excess oxygen
Provide the name(s) for the tertiary alcohols with the chemical formula C6H14O that have a 4-carbon chain. There are three alcohols that should be named for this.
Determine the number of moles in isooctane required to produce 2.550kj of heat in the reaction below:
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