Lacey_Che131_S2012_Lect-10s

Lacey_Che131_S2012_Lect-10s - Electrolytes All vital bodily...

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Lec-10: Electrolytes; Acid base reactions: Precipitation Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 1 Electrolytes ll ital bodily functions happen as a result of electrical signals “All vital bodily functions happen as a result of electrical signals being sent between the various parts of your body and your brain. In order for your body to operate at peak performance, ese electrical signals must be conducted in an efficient these electrical signals must be conducted in an efficient manner- this is where electrolytes come in” Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 2 Electrolytes Ions exist in equilibrium with unionized substance HC 2 H 3 O 2 ( aq ) H + ( ) + C 2 H 3 O 2 - ( ) How do we test for this? Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 3 Non-electrolyte (e.g., CH 3 OH): no ions are formed ` A solution in which no ionization ccurs There is no occurs. There is no conduction of electrical current. ` Examples: aqueous olutions of sugar solutions of sugar, ethelyne glycol. Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 4
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Electrolytes ` Strong Electrolytes: Nearly 100% dissociated into ions. onduct current efficiently. Conduct current efficiently. ` Examples: Solutions of NaCl, HNO 3 ,HCl aCl a + + l NaCl Na ( aq ) + Cl ( ) Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 5 Electrolytes ` Weak Electrolytes : Only partially dissociate into ions. Slightly conductive. ` Examples: Vinegar (aq. solution of acetic acid); tap water. CH 3 CO 2 H CH 3 CO 2 ( ) + H+( ) Roy A. Lacey, Stony Brook University; Che 131, Spring 2012 6 Acids & Bases cids and bases characterize our everyday lives Acids and bases characterize our everyday lives, are present in our bodies and the foods we eat. We could not live in a world that is either too acidic or too base cid- ase chemistry governs many important Acid base chemistry governs many important phenomena in environmental engineering processes Roy A. Lacey, Stony Brook University;
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Lacey_Che131_S2012_Lect-10s - Electrolytes All vital bodily...

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