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The protein apotransferrin binds two Fe(III) ions for cell transport. Consider when a 3.00 mL solution of apotransferrin is titrated with 137 ?L of a 1.70 M Fe(III) solution. The initially colorless solution turns red, and the color change can be measured with a spectrophotometer. First, explain why there is a difference in spectrophotometric response during titration before and after the equivalence point by placing the statements below into the appropriate categories.Now, calculate the concentration of apotransferrin present in the original 3.00 mL solution.
If a reaction mixture initially contains 0.159 M SO2Cl2 , what is the equilibrium concentration of Cl2 at 227 C?
the forensic technician at a crime scene has just prepared a luminol stock solution by adding 11.0 of luminol to creating a solution with a total volume of 75.0 . What is the molarity of the stock solution of luminol?
When exactly 0.500 mL of 0.0287 M Cu(N03)2 was added the signal increased to 37.9 units. Calculate the molar concentration of Cu^2. assuming that the signal was directly proportional to the analyte concentration.
The temperature of a 35.2 g sample of iron increases from 23.7 °C to 29.5 °C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed?
The density of the hydrogen peroxide solution is 1.01 g/mL and the solution contains 3.40% H202 by mass. The vapor pressure of water at 24C is 22 mmHg. Based on this data and information calculate the molar volume at STP.
What is the normality of sulfuric acid solution which contains 6.64 g of H2SO4 in 837 mL of solution provided that the reaction involved
Calculate the mass of urea that should be dissolved in 225 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 8.00 g of sodium carbonate is mixed with one containing 4.75 g of silver nitrate.
At a temperature of 425 0C and a pressure of 735 mmHg, how many grams of {NH_3} can be produced when 4.40 L of {NO_2} react.
what is the presentage compostition of both of the components, which is the limiting reagent (if there is) and what is the theoretical yeild of each of them.
heated from 20 to 50 degrees Celsius. How many calories were needed to bring about the temperature change?
calculate the difference in mass that is hold by a 500.0mL flask at a temperature of 0.0°C from that at temperature of 20.0 °C? (you can assume the volume of the sample at 0.0 °C temperature =volume of the sample at 20.0°C)
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