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Definition to use for the log (logarithm):
the logarithm of a number (n) to a given base (b) is the exponent (e) to which the base must be raised in order to produce that number.
(Raising to the power is the inverse of taking the logarithm.)
logb(n) = e or be = n
For example, the logarithm of 1000 to base 10 is 3 ( log10(1000) = 3),
because 10 to the power of 3 is 1000: 103 = 1000.
-log10[H+] is (by definition) used to calculate the pH of a dilute solution in which [H+] = concentration of H+ (or H3O+) in mol/L.
pH = -log10[H+] or [H+] = 10-pH
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If the pH value of a solution is 4.3 what is the concentration of hydrogen ions?
The solution to this problem is simple if you just work backwards. pH= -log10[H+] You already know what your pH is, so write your equation like this: 4.3= -log10[H+] An understanding of basic logarithm properties lets you know that you can rewrite the equation like this: 10-4.3= [H+] 5.0 *10-5 = [H+]
What number plus 65 equals 90?
35
Tx plus 2t plus hx plus 2h equals?
(t+h)(x+2)
A plus A plus H equals HA whats the the two digit number HA?
A=9 h=1 9+9+1=19
What is the answer of h plus 35 equals 15?
The problem is "h+35=15".Subtracy 35 from each side, so h=-20.
