Are questions with the formulas involving log in the chem and math sections?

[Buk Lau]

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Hello, I have soo many questions about preparing for the pcat and what to study, but i was wondering, since there is no calculators involved, do they expect you to memorize the formulas involving log? Like the chem section, I know several formulas, like those dealing with pH, involve log formulas. Do they ask you these kinds of questions?

 

[prometheusk]

Dont know about the pmat but the MCAT sure does require you to know all those formulas, I would say the pmat would atleast require you to know

-Log[H] = pH

As to doing Logs in your head its pretty simple, remember there is no negative logs, so all log functions are positive.. because obviously you can't have a negative concentration of H+ ions.

log of 10 is 1
log of 100 is 2
log of 1000 is 3

log of 1 is 0

Log of .1 is -1
log of .01 is -2
log of 0.001 is -3

hope you see the correlation

 

[Buk Lau]

Dont know about the pmat but the MCAT sure does require you to know all those formulas, I would say the pmat would atleast require you to know

-Log[H] = pH

As to doing Logs in your head its pretty simple, remember there is no negative logs, so all log functions are positive.. because obviously you can't have a negative concentration of H+ ions.

log of 10 is 1
log of 100 is 2
log of 1000 is 3

log of 1 is 0

Log of .1 is -1
log of .01 is -2
log of 0.001 is -3

hope you see the correlation

Okay, thanks for the insight. Soo if I have a general idea of what log is, I should be fine I think...