Math tricks Flashcards
1
Q
log10^x=? log10^1=? log100=? log10^-3=? log1=?
A
log10^x=x log10^1=1 log100=log10^2=2 log10^-3=-3 log1=log10^0=0
2
Q
log(a x b)=?
A
log(a x b) = log(a) + log (b)
3
Q
log(a/b) = ?
A
log(a/b) = log(a) - log(b)
4
Q
log(1/a) = ?
A
log(1) - log(a) = - log(a)
5
Q
log (#from 1 to 10) = ?
A
log (#from 1 to 10) = 0.#
6
Q
p(anything) = ?
A
p(anything) = -log(anything)
7
Q
what is the pH if the concentration of H+ = 1x10^#?
A
-#
pH = -log(1x10^#) = -log(1) - log(10^#)
= o - (#)
= -#
8
Q
ln(e^x) = ?
A
= x
9
Q
ln(1) = ?
A
0
