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Chemistry 19.2. 19.2. Ion Product Constant for Water. For aqueous solutions, the product of the hydrogen-ion concentration and the hydroxide-ion concentration equals 1.0 10 -14 . Any aqueous solution in which [H + ] and [OH - ] are equal is described as a neutral solution. 19.2.
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19.2 Ion Product Constant for Water • For aqueous solutions, the product of the hydrogen-ion concentration and the hydroxide-ion concentration equals 1.0 10-14. • Any aqueous solution in which [H+] and [OH-] are equal is described as a neutral solution.
19.2 Ion Product Constant for Water • The product of the concentrations of the hydrogen ions and hydroxide ions in water is called the ion-product constant for water (Kw).
19.2 Ion Product Constant for Water • An acidic solution is one in which [H+] is greater than [OH-].
19.2 Ion Product Constant for Water • A basic solution is one in which [H+] is less than [OH]. Basic solutions are also known as alkaline solutions.
for Sample Problem 19.1 • Problem Solving 19.10 • Solve Problem 10 with the help of an interactive guided tutorial.
19.2 The pH Concept • The pH of a solution is the negative logarithm of the hydrogen-ion concentration.
19.2 The pH Concept • Calculating pH
19.2 The pH Concept • A solution in which [H+] is greater than 1 10–7M has a pH less than 7.0 and is acidic. • The pH of pure water or a neutral aqueous solution is 7.0. • A solution with a pH greater than 7 is basic and has a [H+] of less than 1 10–7M.
19.2 The pH Concept
19.2 The pH Concept • Calculating pOH
19.2 The pH Concept • pH and Significant Figures
for Sample Problem 19.2 • Problem Solving 19.12 • Solve Problem 12 with the help of an interactive guided tutorial.
for Sample Problem 19.3 • Problem Solving 19.14 • Solve Problem 14 with the help of an interactive guided tutorial.
19.2 Measuring pH • Phenolphthalein changes from colorless to pink at pH 7–9.
for Sample Problem 19.4 • Problem Solving 19.15 • Solve Problem 15 with the help of an interactive guided tutorial.
19.2 Measuring pH • Acid-Base Indicators
19.2 Measuring pH
19.2 Measuring pH • Universal Indicators
19.2 Measuring pH • pH Meters
19.2 Section Quiz. • 19.2.
19.2 Section Quiz. • 1. If the [OH-] in a solution is 7.65 10-3M, what is the [H+] of this solution? • 7.65 10-17M • 1.31 10-12M • 2.12M • 11.88M
19.2 Section Quiz. • 2. The [OH-] for four solutions is given below. Which one of the solution is basic? • 1.0 x 10-6M • 1.0 x 10-8M • 1.0 x 10-7M • 1.0 x 10-14M
19.2 Section Quiz. • 3. What is the pH of a solution with a hydrogen-ion concentration of 8.5 x 10-2M? • 12.93 • 8.50 • 5.50 • 1.07
