 Site Navigation                          Chemistry: pH - A Logarithm Application #1

Question Group #1
Directions and/or Common Information:
pH = -log [H3O+]
The pH level of a substance is equal to the negative log of the concentration of the hydronium ion, [H3O+].
[H3O+] × [OH-]= 1.0 × 10-14
In any substance, the product of the concentration of the hydronium ion, [H3O+], and the concentration of the hydroxide ion, [OH-], is always equal to 1.0 × 10-14
 Given a substance with a hydronium ion concentration of 2.5 x 10-5 (moles/L) Find the pH of the substance.Find the concentration (in moles/L) of the hydroxide ion. [OH-]
 1

 Given a substance with a hydronium ion concentration, [H3O+], of 1.2 x 10-12 (moles/L) Find the pH of the substance.Find the concentration (in moles/L) of the hydroxide ion. [OH-]
 2

 Given a substance with a hydronium ion concentration, [H3O+], of 1.0 x 10-7 (moles/L) Find the pH of the substance.Find the concentration ( in  moles/L) of the hydroxide ion, [OH-].
 3

 Given a substance with [H3O+] = 5.0 x 10-3 (moles/L) Find the pH of the substance.Find the concentration (in moles/L) of the hydroxide ion, [OH-]
 4

 Given a substance with a pH value of 8.80 Find [H3O+]Find [OH-]
 5

 Given a substance with a pH value of 6.13 Find [H3O+]Find [OH-]
 6

 Given a substance with a pH value of 1.23 Find [H3O+]Find [OH-]
 7

 Given a substance with a hydroxide ion concentration, [OH-], of 5.6 x 10-4 (moles/L) Find [H3O+]Find the pH-]
 8

 Given a substance with a hydroxide ion concentration, [OH-], of 1.7 x 10-10 (moles/L) Find [H3O+]Find the pH.
 9

 Given a substance with a hydroxide ion concentration, [OH-], of 5.0 x 10-5 (moles/L) Find [H3O+].Find the pH.
 10

K Dodd

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