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CHEM 1201 : QuestionpracticeEXam2

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azuremammoth471

15 Mar 2019

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Big scantron: 1-write last name first, first name last 2-test number under student id . 2: what is the concentration (m) of kcl in a solution made by mixing 25. 0 ml of 0. 100 m kcl with 50. 0 ml of 0. 100 m kcl, 0. 100, 0. 0500, 0. 0333, 0. 0250, 125, what is the concentration (m) of. 3ch oh in a solution prepared by dissolving 11. 7 g of. 3ch oh in sufficient water to give exactly 230 ml of solution: 11. 9. 3: there are __________ mol of bromide ions in 0. 500 l of a 0. 300 m solution of. 3albr : 0. 150, 0. 0500, 0. 450, 0. 167, 0. 500. 3. 79 10 : calculate the concentration (m) of sodium ions in a solution made by diluting 50. 0 ml of a. 19: the lowest energy shell that contains f orbitals is the shell with n = __________, 3, 2, 4, 1, 5.

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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)]

Sprint 7:32 PM @ 41% 1 a loncapa.nau.edu Reagent Matching Match the statement to the correct answer. (Some reagents can be used more than once.) The flowchart along with the report sheets in experiment 5 should be very helpful A OH, CO, and PO4 B Disodium EDTA (NazEDTA) C 0.1M sodium carbonate (Na2CO) D Lead chloride (PbCl2(s)) E 6M Hydrochloric Acid (HCI) F 1M ammonium hydroxide (NH40H) G Zinc Nitrate (Zn(NO3);2 H Silver Nitrate (AgNO3) I Silver chloride (AgCl(s)) J Anion K NH4 (aq) and OH(aq) L Colbalt Nitrate (Co(NO3)2) M Lead Nitrate (0.1M Pb(NO3)s) N Cation O Nar, NO, and NH4 P Aluminum Nitrate (Al(NO3)3) Q 6M Nitric Acid (HNO3ã R Barium Nitrate (Ba(NO3)2) S None of the above This reagent is added to fresh solutions in test B2 where there was no reaction in test B1. Salts containing these ions are often insoluble in water and form precipitates Mixing AgNO, and NaCI will produce what white precipitate In test A2 this reagent added to a fresh sample of solution where there was no reaction in test A1 In test B1 this is the first reagent added to the sample This reagent is added fresh samples in test A3 where there was no reaction in tests A1 or A2 Submt AnseTries 0/99 Threaded View Chronological View Sorting/Filtering options Export? s on what is marked as NEW Mark NEW posts no longer new reagent matching Mohamed Abu Khamiss (mya29:nau) Reply (Wed Oct 25 12:55:40 am 2017 (MST)) NEW it is hard for me to understand what exactly needed from me to answer you over did the multiple choice and the questions are more complicated than the choices it self i answered in many different forms never in my life i stay answering a question for 7 hours and it should be more clarified to the student. NEW Anonymous 2 Reply (Wed Oct 25 01:02:03 pm 2017 (MST)) Try your flow chart It's easier to look back into your lab manual. It's on page 69. Good Luck! Current discussion settings: 1. Display AW posts 2. Not new Once marked not NEW Change? Threaded View Chronological View Sorting/Filtering options Export? Preferences on what is marked as NEW Mark NEW posts no longer new