Practice: Chemistry student prepared an aqueous solution at 30ºC. If the solutions contains 7.42 × 10−9 M of hydroxide ions, calculate the pH.
| Sections | |||
|---|---|---|---|
| Acids Introduction | 9 mins | 0 completed | Learn |
| Bases Introduction | 8 mins | 0 completed | Learn |
| Binary Acids | 16 mins | 0 completed | Learn |
| Oxyacids | 10 mins | 0 completed | Learn |
| Bases | 15 mins | 0 completed | Learn |
| Amphoteric Species | 5 mins | 0 completed | Learn |
| Arrhenius Acids and Bases | 5 mins | 0 completed | Learn |
| Bronsted-Lowry Acids and Bases | 20 mins | 0 completed | Learn |
| Lewis Acids and Bases | 13 mins | 0 completed | Learn |
| The pH Scale | 16 mins | 0 completed | Learn |
| Auto-Ionization | 9 mins | 0 completed | Learn |
| Ka and Kb | 16 mins | 0 completed | Learn |
| pH of Strong Acids and Bases | 10 mins | 0 completed | Learn |
| Ionic Salts | 16 mins | 0 completed | Learn |
| pH of Weak Acids | 30 mins | 0 completed | Learn |
| pH of Weak Bases | 32 mins | 0 completed | Learn |
| Diprotic Acids and Bases | 9 mins | 0 completed | Learn |
| Diprotic Acids and Bases Calculations | 35 mins | 0 completed | Learn |
| Triprotic Acids and Bases | 9 mins | 0 completed | Learn |
| Triprotic Acids and Bases Calculations | 17 mins | 0 completed | Learn |
| Additional Guides |
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| Conjugate Acids and Bases |
Auto-ionization is when one water molecule acts as an acid and another acts as a base.
Auto-Ionization
Concept #1: Through auto-ionization the ionization constant of water can be determined.
Concept #2: Like other equilibrium constants, Kw is also affected by changes in temperature.
Example #1: A particular aqueous solution at 50ºC contains 3.7 x 10-4 M of hydronium ions. Calculate the [OH-] and identify solution as acidic, basic, or neutral.
Practice: Calculate the Kw of pure water given the pH = 6.34.
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