Hydrogen Peroxide H202 has a Ka of 2.4 x 10^12 Calculate the pH of a 0.50 M aqueous solution of hydrogen peroxide at 25 degrees Celsius.

1. Hydrogen Peroxide H202 has a Ka of 2.4 x 10^12 Calculate the pH of a 0.50 M aqueous solution of hydrogen peroxide at 25 degrees Celsius.
a) What is the equation for the ionization of H2O2 in water?
b) What is the Ka Expression for H2O2?
c) Solve for X and find the pH of the Solution. Show all work.
2. You have to  prepare 2.000 liters of 0.0500 M Na2S2O3 solution.  Describe exactly what you would do to prepare this solution.  Show all calculations needed. 
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