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Preparation and testing the properties of buffer solutions
- Words:
- 1652
- Submitted:
- Fri Sep 05 2003
Have a little read: ... Date: 2003/3/10 Buffer Solutions Aims Preparation and testing the properties of buffer solutions 1. To prepare two buffer solutions of pH values of 5.2 and 8.8 2. To check the pH and buffer action of the prepared buffers 3. To examine the effect of dilution of the prepared buffers on their pH and buffering capacity Introduction A buffer is a physical area or object protecting something. A chemical "buffer" is a mixture of two compounds that protects the pH of a solution from undergoing large changes when small amounts of acid (in the form of hydroxonium ion [H3O+]) or base (in the form of hydroxide ion [OH-]) are added. Buffers usually contain a weak acid and its conjugate base or a weak base and its conjugate acid. One of the two compounds in a buffering system acts as a proton donor, releasing H+ when pH rises, and the other as a proton acceptor, taking up
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