CHM 2046 Study Guide - Quiz Guide: Magic 2Ch, Logarithm

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blushsheep617

16 Apr 2014

School

University of Florida

Department

Chemistry

Course

CHM 2046

Professor

Christou

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Ch 3coo (aq) + h 2o (l) ch 3cooh (aq) + oh (aq) b) (2 points) complete the expression for the base ionization constant (kb) for ch3coo . K b for ch 3coo =k w/k a (ch 3cooh)=(1. 0 x 10 14)(1. 8 x 10 5) = 5. 6 x 10 10. H 3o + (aq) + cl (aq) n(oh ) = mv = (2)(0. 100 m)(100 x 10 3 l) = 0. 200 moles n(h 3o +) = mv = (0. 400 m)(50 x 10 3 l) = 0. 20 moles. Then, [fe(h 2o) 6] 3+ + h 2o (l) [fe(h 2o) 5(oh)] 2+ + h 3o + (aq) (a) (8 points) what is the ph of a buffer solution prepared from adding 60. 0 ml of 0. 36 m ml of 0. 54 m ammonia (nh3) solution? (kb for nh3 is. 1. 8 x 10 5). new volume (vf) = (60. 0 + 50. 0) ml = 110. 0 ml new [nh4 new [nh3] = ivim fv ivim fv (0. 36 (0. 54.

Related Questions

A. COMPLETE THE ANSWER SHEET: write your name, banner id # and the date in the spaces provided on the scantron. All answers must be on the scantron and this exam. B. Read each item carefully; select the word, phrase or expression that best completes the test item. Indicate the answer blackening the appropriate space on your answer sheet. You MUST erase completely to receive credit for an erased item. This AND the scantron must be turned in. All questions are worth 5 points. R = 0.08206 (atm middot L)/(mol middot K) = 8.314 J/(mol middot K) pH = - log[H_3 O^+] pH + pOH = 14 = pK_a + pK_b [OH^-][H_3 O^+] = 10^-14 = K_a times k_b (at least in water, at 25 degree C) pH = pKa + log([base]/[acid]) poH = pK_b + log ([acidy]/[base]) K_p = K_c(RT)^da For a salt that dissociated into a cation with a coefficient of n and an anion with a coefficient of m: Molar Solubility = squareroot K_/n^m^x = - b plusminus squareroot b^2 - 4ac/2a where 0 = ax^2 + bx + c Which of the following solutions would have the second lowest pH? Assume all their concentrations are 0.10 M at 25 degree C. The acid is followed by its K_a value. A) HF, 3.5 times 10^-4 B) HCN, 4.9 times 10^-10 C) HNO_2, 4.6 times 10^-4 D) HCHO_2, 1.8 times 10^-4 E) HClO_2 1.1 times 10^-2 Which of the following are false about systems at equilibrium? A) The rate of the forward and reverse reactions are the same. B) The concentrations of each component are equal. C) The concentrations of each component don't change over time. D Catalysts do not affect the equilibrium. E) This symbol is used in a reaction where an equilibrium is present: - The reaction below has a K_c value of 3.64 times 10^-3. What is the value of K_p for this reaction at 25 degree C? CO_2 (g) C(s, graphite) = 2 CO(g) A) 3.64 times 10^-3 B) 6.09 times 10^-6 C) 8.90 times 10^-2 D) 1.49 times 10^-4 E) 2.17 Express the equilibrium constant K for the reaction in question 3. A) [CO(g)]/[CO_2(g)][C(s)] B) [CO(g)]/[CO_2(g)] C) [CO(g)]^2/[CO_2(g)] [C(s)] D) [CO_2(g)]^2 E) [CO(g)]^2/[CO_2(g)]

CHM 2046 Study Guide - Quiz Guide: Magic 2Ch, Logarithm

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