Chem%20112%20Practice%20exam%202

Chem%20112%20Practice%20exam%202 - Chem 112 Section 2 Exam...

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Chem 112 Section 2 Exam 2 Name:______________________________________ Seat # Please put each of your answers on the front cover to make it easier for grading. I will also check in the test booklet for problems that require calculations. If the answer is wrong, partial credit will be given whenever possible. You must have calculations present within the test to get credit for an answer even if the answer is correct . The seat you are sitting in is linked to a particular exam. The seat number you write down must match the exam or you will also lose 25 points automatically!!!!! 1 4.7 CH 3 COO - CH 3 COOH (aq)+ H 2 O CH 3 COO - (aq) + H 3 O + (aq) 2 An acid is a chemical that increases the concentration of H+ Must have OH- present in the chemical Cl- 3 H 2 S Size of anion (takes precedence over electronegativity) PH 3 4 1.00 x 10 -10 1.00 x 10-4 4 5 9 0.30M NH 3 (aq) + H 2 O(aq) NH 4 + (aq) + OH - (aq) NH 4 + (aq) + H 2 O(aq) NH 3 (aq) + H 3 O + (aq) 6 7 green 0.2M 7 3.30 NO 2 - 4.0M 8 neutral KOH KOH is a strong base, so H 3 O + cannot be formed so the solution cannot be acidic
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Kinetics and Equilibrium: For the reaction aA + bB + … cC + dD Rate= k[A] m [B] n K c = [C] c [D] d K p = P c C P d D Q c = [C] c [D] d ln(k 2 / k 1 ) = E a /R (1/T 1 -1/T 2 ) [A] a [B] b P a A P b B [A] a [B] b k p = k c (RT) Δ n Zero Order: [A] = -kt + [A] 0 t 1/2 = [A] 0 /2k First Order: ln[A] = -kt + ln[A] 0 t 1/2 = 0.693/k Second Order: 1/[A] = kt + 1/[A] 0 t 1/2 = 1/ ([A] 0 k) Acidity: pH = -log [H
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This note was uploaded on 04/30/2008 for the course CHM 112 taught by Professor Brittian during the Spring '08 term at Rhode Island.

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Chem%20112%20Practice%20exam%202 - Chem 112 Section 2 Exam...

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