[newb02]

I am super lost on this problem any help or suggestions of some material i could find would be very helpful as I could not afford my soil chemistry book this semester.

The rate of weathering of feldspar in acid soil can be described by the following    rate equation.
- D[Feldspar] / dt   =  k [H+]

Where k = 10-12 sec-1 (measured at 25°C)

What is the rate of feldspar disappearance at pH 5?  At pH 3?

Calculate the change in reaction rate at pH 5 for 5°C instead of 25°C. Assume Ea = 54 kJ mol -1;  A = 3.2 X 10-3  sec-1

Calculate the change in reaction rate when a catalyst reduces the Ea by 50 % at pH 5 and 25°C  (New Ea = 27 kJ mol -1).

[billnotgatez]

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