https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:acid-base-chemistry/x203b0fc81a964b2d:buffers-and-common-ion-effect/v/buffer-solutions 2022-11-16T04:22:43.7414897Z Buffer solutions Buffer solutions maintain a stable pH by neutralizing added acids or bases. They consist of a weak acid and its conjugate base, which exchange protons and hydroxide ions to form water. The Henderson-Hasselbalch equation expresses the pH as a function of the PKa and the ratio of the base and acid concentrations. video https://cdn.kastatic.org/googleusercontent/FqGS1Fqtfl3zSwzBrnFPEfwxqTEQ2hujYto6c0Wnj5NtXg00xUfaCnT5dLGM-MYJEPAhQALx3ylwm5XJqPFOX8Jt Buffer solutions Buffer solutions maintain a stable pH by neutralizing added acids or bases. They consist of a weak acid and its conjugate base, which exchange protons and hydroxide ions to form water. The Henderson-Hasselbalch equation expresses the pH as a function of the PKa and the ratio of the base and acid concentrations. https://cdn.kastatic.org/ka-youtube-converted/oIlMsYOKEsc.mp4/oIlMsYOKEsc.mp4 397 Buffers and common ion effect https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:acids-and-bases/x2eef969c74e0d802:buffers/v/hendersonhasselbalch-equation 2022-09-05T08:18:59.810508578Z Henderson–Hasselbalch equation One way to determine the pH of a buffer is by using the Henderson–Hasselbalch equation, which is pH = pKₐ + log([A⁻]/[HA]). In this equation, [HA] and [A⁻] refer to the equilibrium concentrations of the conjugate acid–base pair used to create the buffer solution. When [HA] = [A⁻], the solution pH is equal to the pKₐ of the acid. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/ce2cface-f84f-41e2-8ec8-9a80b4aa306c_1280_720_base.png Henderson–Hasselbalch equation One way to determine the pH of a buffer is by using the Henderson–Hasselbalch equation, which is pH = pKₐ + log([A⁻]/[HA]). In this equation, [HA] and [A⁻] refer to the equilibrium concentrations of the conjugate acid–base pair used to create the buffer solution. When [HA] = [A⁻], the solution pH is equal to the pKₐ of the acid. https://cdn.kastatic.org/ka-youtube-converted/7QgtdYiWH50.mp4/7QgtdYiWH50.mp4 454 Buffers and common ion effect https://www.khanacademy.org/science/biology/water-acids-and-bases/acids-bases-and-ph/a/acids-bases-ph-and-bufffers 2021-04-29T07:49:51Z Acids, bases, pH, and buffers Acidity and basicity, proton concentration, the pH scale, and buffers. article https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/buffer-solutions/v/buffer-solution-calculations 2021-01-04T18:35:19Z Buffer solution pH calculations Example of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH.  video https://cdn.kastatic.org/googleusercontent/VuMnuOMsfszvfwrtCsD9U66RsNT0vyOQ2Dt5s3qhBsZngNR9lDX7V5_F28k-7bp9HFZTsX9um2ou5_z_PssctqU Buffer solution pH calculations Example of calculating the pH of a buffer solution using the Henderson-Hasselbalch equation, including the pH of the buffer solution after adding some NaOH.  https://cdn.kastatic.org/ka-youtube-converted/lsHq5aqz4uQ.mp4/lsHq5aqz4uQ.mp4 699 Buffers and common ion effect https://www.khanacademy.org/science/grade-11-chemistry-snc-aligned/x203b0fc81a964b2d:acid-base-chemistry/x203b0fc81a964b2d:buffers-and-common-ion-effect/e/calculating-the-ph-of-buffer-solutions 2023-02-05T23:01:10.052992535Z Buffer solutions Let's solve a few problems to calculate the pH of a buffer solution. Aanchal Arora exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:equilibrium/x2eef969c74e0d802:solubility-equilibria/v/solubility-and-the-common-ion-effect 2022-09-05T08:18:59.810508578Z The common-ion effect The solubility of an ionic compound is decreased by the presence of a common ion (an ion that is also present in the compound); this is known as the common-ion effect. Jay video https://cdn.kastatic.org/ka_thumbnails_cache/7dccf10c-0750-4411-8e6d-fc3e292f1ce4_1280_720_base.png The common-ion effect The solubility of an ionic compound is decreased by the presence of a common ion (an ion that is also present in the compound); this is known as the common-ion effect. https://cdn.kastatic.org/ka-youtube-converted/fI3U9T7LigY.mp4/fI3U9T7LigY.mp4 608 Buffers and common ion effect https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/buffer-solutions/v/common-ion-effect 2021-01-04T18:35:20Z Common ion effect and buffers The common ion effect describes the effect on ​equilibrium that occurs when a common ion (an ion that is already contained in the solution) is added to a solution. The common ion effect generally decreases ​solubility of a solute. It also can have an effect on buffering solutions, as adding more conjugate ions may shift the pH of the solution. video https://cdn.kastatic.org/googleusercontent/JLtnMUG5v029jKRIRxRDEq_HbeEGqHJ5toMTmYYfQcODJf4AHt9SWuUOH7vRZzhrEX9MBx6WbTpde9V6EaWcY8TB Common ion effect and buffers The common ion effect describes the effect on ​equilibrium that occurs when a common ion (an ion that is already contained in the solution) is added to a solution. The common ion effect generally decreases ​solubility of a solute. It also can have an effect on buffering solutions, as adding more conjugate ions may shift the pH of the solution. https://cdn.kastatic.org/ka-youtube-converted/223KLPnJCBI.mp4/223KLPnJCBI.mp4 799 Buffers and common ion effect