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Write a balanced half-reaction for the reduction of hydrogen peroxide to water in an acidic solution.
a. 2H2O2(l) + 2e- --> 2 H2O (l) + O2(g)
b. H2O2(l) + 4H+(aq) + 2e- --> 2H2O(l) + H2(g)
c. H2O2 (l) + 2H+(aq) + 4e- --> 2H2(g) + O2(g)
d. H2O2(l) + 2H+(aq) + 2e- --> 2H2O(l)
e. 2 H2O2(l) ---> 2 H2O(l) + O2(g)
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m.
calculate the work done in joules against a pressure of 1.0 atm at 25oc. if 3 moles of h2 react with 3 moles of cl2 to
The pKa of the acid function at the 2-position is approximately 2, whereas that at the 1 position is about 3. Which of the 2 is more acidic and why
Electron Configurations of Atoms and Ions The electron configuration of an atom tells us how many electrons are in each orbital. For example, helium has two electrons in the 1s orbital. Therefore the electron configuration of He is 1s^2. Part A Wh..
Write ionic and net ionic equations for the following reactions. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
Assumine the rate law for the system is rate= k(I-)^x(S208)^y, what are the values of x and y for the system
Calculate the concentration of Cu in the chloroform phase if 39 mL of a 0.28 M aqueous Cu solution buffered to pH 4 is equilibrated with 12 mL of chloroform.
The Ka values for nitrous acid HNO_2 and hypochlorous HClO) acid are 4.5 10^{-4} and 3.0 10^{-8}, respectively. Which one would be more suitable for use in a solution buffered at pH = 7.0?
They will dilute the 0.5 M solution to obtain 100 mL of 0.15M solution and dilute the 0.5m solution to obtain 10,000 ppm per mass. What is the molarity, molality, mass fraction and mole fraction
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
If the minimum energy required to break the C-Cl bond in CF3Cl is 540 kJ/mol, what is the longest wavelength of radiation that will break this bond?
Starting with the standard free energies of formation from the following table calculate the values of delta G° and E° cell of the following reactions:
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