Exam I eqn sheet PDF

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Chem 104 Exam I Equation Sheet Kw = Ka x Kb

Kw=[H+][OH-]

Kw = 1.0 x 10-14 (at 25 oC)

pH + pOH = 14 (at 25 oC)

pKa + pKb = 14 (at 25 oC)

[H+] = 10-pH

𝑝𝐻 = 𝑝𝐾𝑎 + 𝑙𝑜𝑔 𝑎𝑚𝑜𝑢𝑛𝑡 𝑟𝑒𝑎𝑐𝑡𝑒𝑑

% dissociation = 𝑖𝑛𝑖𝑡𝑖𝑎𝑙 𝑐𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑖𝑜𝑛 𝑥 100

[𝐴− ]

[OH-] = 10-pOH

𝐻𝐴

pKa = -log Ka

Kb = 10-pKb

Ka = 10-pKa

pH = -log[H+]

𝑝𝐻 =

𝑝𝐾𝑎1 + 𝑝𝐾𝑎2 2

Go = Ho - TSo  G = w max

K = e^ - (Go/RT)

S surr = -H/T

R = 8.314 J/mol K = 0.0821 L atm/mol K

Monoprotic Acids Chlorous acid Hydrofluoric acid Nitrous acid Formic acid Benzoic acid Acetic acid Hypochlorous acid Hydrocyanic acid Phenol

Formula HClO2 HF HNO2 HCOOH C6H5COOH CH3COOH HClO HCN C6H5OH

Polyprotic Acids Sulfuric acid Oxalic acid Sulfurous acid Phosphoric acid Ascorbic acid Carbonic acid Bases Ethylamine Methylamine Ammonia Pyridine Aniline

Formula CH3CH2NH2 CH3NH2 NH3 C5H 5N C6H5NH2

S univ = S sys + S surr G = -nFE

Ka 1.2×10–2 7.2×10–4 4.0×10–4 1.8×10–4 6.3×10–5 1.8×10–5 2.9×10–8 6.2×10–10 1.6×10–10 Ka1 large 6.5×10–2 1.5×10–2 7.5×10–3 7.9×10–5 4.3×10–7

Kb 5.6×10–4 4.4×10–4 1.8×10–5 1.7×10–9 3.8×10–10

R = 8.314 J/mol K

G = Go + RT ln(Q)

Go = -RT ln(K)

Formula H2SO4 H 2C2O 4 H2SO3 H3PO4 H 2C6H 6O 6 H2CO3

pKb = -log Kb

Ka2 1.2×10–2 6.1×10–5 1.0×10–7 6.2×10–8 1.6×10–12 5.6×10–11

Ka3

4.8×10–13

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