pH = -log(√(Kw))
Let's interpret this using the available info on calculated question.
Correct Answer Formula= {base}*{height} So you need the * between values (or / + -) then you want log and as you are doing some chemistry log10.
you need squareroot which is sqrt
you Kw seems to be the water constant dissociation i.e 1.0e-14 which is how to write numbers as 1,0*10-14 .
Let's suppose that it is variable ( at different temperature ) so we use variable {x}
So we get log10(sqrt({x}*1e-14))
Try it and it will give you the correct result.
If {x} = 9.7
log10(sqrt({x}*1e-14))
you will get
log10(sqrt(9.7*1e-14)) = -6.5
Min: -7.1572755461536---Max: -5.8559527195801
Réponse correcte : -6.5 dans les limites de la valeur réelle -6.5066141328669
Réponse correcte : -6.5 dans les limites de la valeur réelle -6.5066141328669
with log10(pow({x}*1e-14,-0.5))
you will get
log10(pow(9.7*1e-14,-0.5)) = 6.51
Min: 6.4415479915381---Max: 6.5716802741956
Réponse correcte : 6.51 dans les limites de la valeur réelle 6.5066141328669
Min: 6.4415479915381---Max: 6.5716802741956
Réponse correcte : 6.51 dans les limites de la valeur réelle 6.5066141328669
Pierre
P.S. As you I did not find it the first time I used calculated question