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Unformatted text preview: Preparation and Testing of Buffer Solutions Abstract: This experiment was performed in order to examine the properties and components of buffers. A buffer was created and then tested at 10% strength. A buffer was also created at a target pH. The pKa was determined of the buffer of an unknown acid solution (#8) to be 6.77. The change in pH of the full strength buffer when HCl was added was 0.03 and when NaOH was added the change was 0.04. At 10% strength the buffer changed by .16 and .07 when HCl and NaOH where added respectively. Introduction: A buffer is an aqueous solution created by the combination of a acid and its conjugate base or a base and its conjugate acid. To create these an acid, or base is dissociated in water and then turned into a salt by adding the appropriate compound which is often NaOH or HCl which both readily dissociate and form ionic salts. The salt is then dissolved in water to create the conjugate acid or base and then mixed with the original acid or base. Buffers are very important as they help keep a stable pH in then mixed with the original acid or base....
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