https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:introduction-to-acids-and-bases/v/the-ph-scale 2022-10-05T02:43:18.611402953Z The pH scale The pH scale is a convenient way to represent the acidity or basicity of a solution. We can calculate the pH of a solution by taking the negative logarithm of the hydronium ion concentration, or pH = -log[H₃O⁺]. At 25°C, a solution with pH < 7 is acidic, a solution with pH > 7 is basic, and a solution with pH = 7 is neutral. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/754d4644-9352-4eb1-b4a9-b7cd5e4f5412_1280_720_base.png The pH scale The pH scale is a convenient way to represent the acidity or basicity of a solution. We can calculate the pH of a solution by taking the negative logarithm of the hydronium ion concentration, or pH = -log[H₃O⁺]. At 25°C, a solution with pH < 7 is acidic, a solution with pH > 7 is basic, and a solution with pH = 7 is neutral. https://cdn.kastatic.org/ka-youtube-converted/75j1b1l6PWU.mp4/75j1b1l6PWU.mp4 529 Acid-base equilibrium https://www.khanacademy.org/science/grade-12-chemistry-snc-aligned/x7a43e770fc9e15cf:acid-base-chemistry-and-ph/x7a43e770fc9e15cf:acid-base-equilibrium/v/definition-of-ph 2021-05-25T21:59:59Z Definition of pH video https://cdn.kastatic.org/googleusercontent/nzNAGy3nP285UZpaRk7IKuminBvvIMbJ-UHbNgHZr4URg8iFS8h8NFO7qJFuwobOYU4RzPCLt7BTh4-eU0RS62us Definition of pH https://cdn.kastatic.org/ka-youtube-converted/gJfOlBMfYkg.mp4/gJfOlBMfYkg.mp4 730 Acid-base equilibrium https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/v/introduction-to-definition-of-ph 2021-03-18T10:33:22Z Definition of pH Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.  video https://cdn.kastatic.org/googleusercontent/pf3RWNnKKyhvaMuHbtZSJKxlpJ9Iu0IfztzqlxyrLsXQ9_hjpmB8pUKkBShKg5y0rT0PZbPLO5ACXmIEbOtkTJs Definition of pH Introduction to pH and the pH scale. Examples of calculating pH of pure water, bleach, and orange juice.  https://cdn.kastatic.org/ka-youtube-converted/J7-GewgqWUQ.mp4/J7-GewgqWUQ.mp4 697 Acid-base equilibrium https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:acidbase-titrations/v/strong-acid-strong-base-titrations 2022-10-05T02:43:18.611402953Z Strong acid–strong base titrations The results of an acid–base titration can be summarized using a titration curve, which plots pH vs. volume of titrant added. For the titration of a strong acid with a strong base, the curve begins acidic and then turns basic after the equivalence point, which occurs at pH = 7. For the titration of a strong base with a strong acid, the curve is similar except that it begins basic and turns acidic. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/a14940eb-eac6-492f-b57e-d9e05df31acf_1280_720_base.png Strong acid–strong base titrations The results of an acid–base titration can be summarized using a titration curve, which plots pH vs. volume of titrant added. For the titration of a strong acid with a strong base, the curve begins acidic and then turns basic after the equivalence point, which occurs at pH = 7. For the titration of a strong base with a strong acid, the curve is similar except that it begins basic and turns acidic. https://cdn.kastatic.org/ka-youtube-converted/qkh0SMozSBQ.mp4/qkh0SMozSBQ.mp4 540 Acid-base equilibrium https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:acidbase-titrations/v/weak-acid-strong-base-titrations 2022-10-05T02:43:18.611402953Z Weak acid–strong base titrations For the titration of a weak acid with a strong base, the pH curve is initially acidic and has a basic equivalence point (pH > 7). The section of curve between the initial point and the equivalence point is known as the buffer region. At the half-equivalence point, the concentrations of the buffer components are equal, resulting in pH = pKₐ. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/71c20289-aa16-40f1-92a3-82ba01f55625_1280_720_base.png Weak acid–strong base titrations For the titration of a weak acid with a strong base, the pH curve is initially acidic and has a basic equivalence point (pH > 7). The section of curve between the initial point and the equivalence point is known as the buffer region. At the half-equivalence point, the concentrations of the buffer components are equal, resulting in pH = pKₐ. https://cdn.kastatic.org/ka-youtube-converted/sZW1qoQl3ng.mp4/sZW1qoQl3ng.mp4 729 Acid-base equilibrium https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:acidbase-titrations/v/weak-base-strong-acid-titrations 2022-10-05T02:43:18.611402953Z Weak base–strong acid titrations For the titration of a weak base with a strong acid, the pH curve is initially basic and has an acidic equivalence point (pH < 7). The section of curve between the initial point and the equivalence point is known as the buffer region. At the half-equivalence point, the concentrations of the buffer components are equal, resulting in pH = pKₐ (where pKₐ refers to the conjugate acid of the weak base). Jay video https://cdn.kastatic.org/ka_thumbnails_cache/65e32ea1-6292-40a6-9e82-e6818947957b_1280_720_base.png Weak base–strong acid titrations For the titration of a weak base with a strong acid, the pH curve is initially basic and has an acidic equivalence point (pH < 7). The section of curve between the initial point and the equivalence point is known as the buffer region. At the half-equivalence point, the concentrations of the buffer components are equal, resulting in pH = pKₐ (where pKₐ refers to the conjugate acid of the weak base). https://cdn.kastatic.org/ka-youtube-converted/IZ7NEYnuovI.mp4/IZ7NEYnuovI.mp4 634 Acid-base equilibrium https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/titrations/v/titration-of-a-strong-acid-with-a-strong-base 2023-01-21T04:23:32.614640249Z Titration of a strong acid with a strong base In a strong acid-strong base titration, the acid and base will react to form a neutral solution. At the equivalence point of the reaction, hydronium (H+) and hydroxide (OH-) ions will react to form water, leading to a pH of 7. This is true of all strong acid-strong base titrations. An example of this would be the titration of hydrochloric acid (strong acid) and sodium hydroxide (strong base) to form sodium chloride and water. Jay video https://cdn.kastatic.org/googleusercontent/nwNZe3Ny2HPY4yU1Oztxotau4bFY591l0LXkYtMw-yFr0opryRTcgYCsM2_giS_E3AaMF0RJXz4RT837ls5AcyDrAA Titration of a strong acid with a strong base In a strong acid-strong base titration, the acid and base will react to form a neutral solution. At the equivalence point of the reaction, hydronium (H+) and hydroxide (OH-) ions will react to form water, leading to a pH of 7. This is true of all strong acid-strong base titrations. An example of this would be the titration of hydrochloric acid (strong acid) and sodium hydroxide (strong base) to form sodium chloride and water. https://cdn.kastatic.org/ka-youtube-converted/JoGQYSTlOKo.mp4/JoGQYSTlOKo.mp4 612 Acid-base equilibrium https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:acid-base-chemistry/x203b0fc81a964b2d:acid-base-titrations/a/acid-base-titration-curves 2021-05-25T21:59:58Z Acid-base titration curves article https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:acid-base-chemistry/x203b0fc81a964b2d:acid-base-titrations/e/titration-questions 2021-06-05T01:54:07Z Titration questions Questions pertaining to titration William Gilpin exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:acidbase-titrations/e/acid-base-titrations 2023-08-07T17:25:22.494770007Z Acid–base titrations Check your understanding of acid–base titrations in this set of free practice questions designed for AP Chemistry students. exercise https://www.khanacademy.org/science/grade-12-chemistry-snc-aligned/x7a43e770fc9e15cf:acid-base-chemistry-and-ph/x7a43e770fc9e15cf:acid-base-equilibrium/e/acid-base-questions 2021-06-05T01:57:29Z Acid/base questions Acid/base questions William Gilpin exercise