Dear GWB users,
I have noticed something weird in the RXN tool. Specifically, writing the reaction:
albite_low + K+ = k-feldspar + Na+
and assigning an activity of 0.891 to k-feldspar, the logK is calculated as:
logK = -0.0501 + logNa - logK
However, in reality, the logarithm of the equilibrium constant should be:
logK = +0.05012 + logNa - logK
because:
logK = log[(Na/(K*0.891)] = logNa - log(K*0.891) = logNa - logK - log(0.891) = logNa - logK + 0.0512
Is that not correct? Or perhaps I am making a mistake somewhere? I would like to specify that I am using version 12.0.9.