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13 Cards in this Set
- Front
- Back
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acid + base = ?? |
salt |
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what is a buffer solution? |
solution that resist the change of PH when a small amount of an acid or base is added to it. |
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what is buffer? |
called to the mixture of solutes that is responsible for the buffering action of a solution |
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examples of buffer |
bicarbonates phosphates amino acids proteins |
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what are the importance of buffer solution? |
1. the PH blood maintains a constant PH of 7.4 unber a very wide variety take of physiological condition 2. in aqueous phase of all living cells, buffer solution maintains nearly constant PH of 7 |
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many chemical reaction in aqueous solution change the pH of the solution and these reaction can be studied at a constant pH by ________ in buffer solution |
carrying them out |
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a buffer is usually made by mixing _____ |
weak acid with its conjugate base or weak base with its conjugate acid |
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acid and base components of the buffer (do, do not) react with each other |
do not |
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when base is added to the buffer, what happens? |
it reacts with the acid compound of the buffet, thus the pH of the buffer solution doesn't change appreciably |
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what is enthalpy? |
heart change that occurs at constant pressure |
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what is heat? |
a reflection of random molecular motion |
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what is exothermic process? |
when the system releases heat and assigned by negative heat |
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what is endothermic process? |
system gains head and is assigned by positive heat |
