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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.
What is the pH for a solution that has h plus equals 3.6 x 10 -9 M?
pH means -log10(H+concentration) so pH of a H+ concentration 3.6x10-9 is: pH = -log10(3.6x10-9) ≈ 8.4
What is the pH of a soultion that has a h plus concentration of 0.001m?
pH = -log10[H+] = -log10(0.001 mol/L )= -log10(10-3)= 3
What is the pH of an aqueous solution if the concentration of H plus equals 0.00097?
pH s calculated as the negative log10 of the hydrogen ion concentration. So log10 of 0.000724 = -3.14 so pH= 3.14
What is the pH of a solution with h plus equals 7.0 x 10-2?
The little 'p' means -log10 (that's the negative log to base 10). Thus pH means -log10(Hydrogen ion concentration) → pH of the solution = -log10(7.0 x 10-2) ≈ 1.15
A solution of HBr has H plus equals 2.1 x 10-6 What is the pH of this solution?
1.70
Associate pH numbers to H plus concentration?
The pH is the co-logarithm of the activity of the dissolved ions H+ in a solution. The formula is (a is the activity):pH = - log10 aH
A solution of HCl is 0.01 m what are the h plus and pH of this soluton?
The concentration of H+ [H+] = 0.01 m/l by definition pH = -(log10 (0.01)) therefore pH = 2
How to calculate pH of 1N HCl solution?
pH = -log10[H+], where [H+] is the hydrogen ion concentration. So, in this case, pH = -log10[1], yielding pH = 0.
What is the pH of a solution with H plus 7.0 x 10-2?
The little 'p' means -log10 (that's the negative log to base 10). Thus pH means -log10(Hydrogen ion concentration) → pH of the solution = -log10(7.0 x 10-2) ≈ 1.15
A rainwater sample has a of 3.45What is the hydrogen ion concentrationH plus?
pH = -log10[H+][H+] = 10-pH[H+] = 10-3.45[H+] = 3.548 x 10-4 (this is the amount of mols of H+ per L)
How does the POH scale form PH scale?
pH + pOH = 14 pH is a measure of the hydrogen ion concentration, [H+] pOH is a measure of the hydroxide ion concentration, [OH-] pH = -log10[H+] pOH = -log10[OH-]
What relationship do you find between the pH number and the power of 10 used to express the H?
pH = -log10 [H+] So 0.001M = -log10 [H+] = 3 10 times higher concentration = 0.01M so -log10 [H+] = 2 The relationship is thus for every 1 unit of pH reduction there is a tenfold increase in concentration.
