18 Acids & Bases

18 Acids & Bases - Compare the equilibrium...

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1 1 Compare the equilibrium constants for the production of ammonia at 300 K and 800 K? N 2 (g) + 3H 2 (g) 2NH 3 (g): H o = - 92 kJ/mol, S o = - 199 J/mol K, G o = - 32 kJ/mol R = 8.314 J/mol K What did you get? A) 300 K = 4.4 x 10 5 and 800 K = 4.2 x 10 -5 B) 36.9 and 23.9 C) 12 x 10 3 and 8 x 10 -3 D) 13.0 and 10.1 ln( ) 1 ) o oo G K RT H S K R TR  2 Chapter 16 Acids & Bases The Brønsted-Lowry Definition Much of this is should be familiar from 129 & 131! An acid is a chemical species that donates a hydrogen ion (proton, H + ) in a chemical reaction. A base is a chemical species that accepts a hydrogen ion in a chemical reaction. Aqueous acid-base chemistry occurs in a water solution or environment and often involves water as a reactant or product. HCl(g) + H 2 O(l) Cl - (aq) + H 3 O + (aq)
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2 3 Example Acid-Base Reactions Every acid-base reaction has two reactants, an acid and a base: acid example. acetic acid + water acetate ion + hydronium ion CH 3 COOH is the acid, water is the base . CH 3 COO - is the conjugate base of CH 3 COOH A carboxyl group is one signature of an acid. O O H CH 3 CO 2 H + H 2 OC H 3 CO 2 + H 3 O + H atom bonded to an electronegative O plus a carbonyl group!
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18 Acids & Bases - Compare the equilibrium...

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