Chapt13_1 - SOLUTIONS Properties of Solutions...

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Mary J. Bojan Chem 110 SOLUTIONS Properties of Solutions (electrolytes) Chapter 4.1 Concentration (Section 4.5, 13.4) molarity M mass % % mole fraction X i ppm molality m Solution process (energy changes) Solubility saturation supersaturation
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Mary J. Bojan Chem 110 SOLUTIONS Homogeneous mixture : Solute : Solvent : Aqueous solutions :
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Mary J. Bojan Chem 110 Which Bulbs Light Up? Distilled H 2 O Tap H 2 O NaCl(aq) 1M HCl(aq) 1M CH 3 COOH sugar(aq) CH 3 OH For bulb to light, some minimum amount of current is needed. amount of current is related to the CONDUCTIVITY of the solution. CONDUCTIVITY : ability to conduct electricity Bulb Wattage 7.5 25 40
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Mary J. Bojan Chem 110 Electrolytes Definition: Strong Good conductors NaCl(s) + H 2 O Na + (aq) + Cl (aq) + H 2 O HCl(aq) + H 2 O H 3 O + (aq) + Cl (aq) Weak Poor conductors NH 3 (aq) + H 2 O NH 4 + (aq) + OH (aq) CH 3 COOH(aq)+H 2 O CH 3 COO (aq)+H 3 O + (aq) Nonelectrolytes Non-conductors C 6 H 12 O 6 (s)+H 2 O C 6 H 12 O 6 (aq)+ H 2 O glucose
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Mary J. Bojan
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Chapt13_1 - SOLUTIONS Properties of Solutions...

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