Thephofblackcoffee is53calculateitsh3o h3o

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Unformatted text preview: SOLUTIONS Examples: – + – 1. Calculate the [OH ] in a so lut ion with [H3O ] = 2.3 x 10 4 M. Classify the so lut ion as acid or basic. éOH ù = K w = êë úû é + ù êë H 3O úû + – – 2. Calculate the [H3O ] in a so lution wit h [OH ] = 2.3 x 10 4 M. Classify the so lut ion as acid or basic. é H 3 O + ù = K w = êë úû é ù êëOH úû – + – 3. Calculate the [OH ] in a so lut ion with [H3O ] = 5.8 x 10 8 M. Classify the so lut ion as acid or basic. + – – 4. Calculate the [H3O ] in a so lution wit h [OH ] = 1.3 x 10 2 M. Classify the so lut ion as acid or basic. 7 Chemistry 52 Chapter 15 THE pH SCALE · The acidity of a solut ion is commo nly measured on a pH scale. + pH = – log [H3O ] · The pH scale ranges fro m 0­14, where acidic solutio ns are less than 7 and basic solut ions are greater than 7. Acidic solutions pH < 7 + –7 [H3O ] > 1.0 x 10 Neutral solutions pH = 7 + –7 [H3O ] = 1.0 x 10 Basic solutions pH > 7 + –7 [H3O ] < 1.0 x 10 Exa...
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