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EDTA is utilized to slow microbial degradation of mayonnaise by preventing bacterial uptake of iron. Assuming that mayonnaise has a pH of 3.9 and a total iron content of 10-6 mole/liter, how much EDTA must be added to complex 99% of the total Fe? Assume that mayonnaise is an infinitely dilute aqueous solution and that complexation by ligands other than EDTA and hydroxyl ion is negligible. The stability constant for FeEDTA- is 1027.7. pKa values for H4ETDA are 2.3, 3.2, 6.4 and 10.9.
Conversely, what is the percent H2SO4 in a 6.0M solution of H2SO4? Density of solution = 1.84g/cm^3
What fraction of thiocyanate ion is accually converted into the complex ion?
How many mL of oxygen gas, measured at 757.2 mm HG (uncorrected) and 22.8 C by the displacement of water, would you expect to obtain from the complete decomposition
The activation energy for the following first-order reaction is 318 kJ/mol. N2O5(g)-->2NO2(g)+(1/2) O2(g). The value of the rate constant (k) is 6.65x10^-5 s^-1 at 84 degrees C. What is the value of k at 49 degrees C. (R=8.314 J/mol K)?
The fizz produced when a Alka-Seltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate(NaHCO3) and citric acid(H3C6H5O7): 3NaHCO3(aq) + H3C6H5O7(aq) --> 3CO2(g) +3H2O(l)+Na3C6H5O7(aq)
Determine the number of representative particles in each substance.
Explain why and calculate the difference between the delta S° values at 298 K for the complete dissociation of the two complex ions. (Hint: the value delta H is about the same for both systems.)
draw the organic product you would expect to obtain from reaction of the following model triglyceride
Explain what happens to the atomic number of a nucleus when positron emission occurs
what is the calculated value of partial pressure of o2 in acid mine water of ph 2 in which fe2+=fe3+.
Calculate the mass in grams of calcium bromide the chemist has added to the flask. Round your answer to 3 significant digits.
How much heat is needed to melt 22.4g of ice at zero degrees celcius to form liquid water at zero degress celcius?
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