Exam 3B with Answers | General Chemistry II | CHEM 113, Exams of Chemistry

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C113, section OL i 7 ON | Exam 3, October 29, 2003 | i ane ___$_—=—_———— VERSION [‘B” 1) What is the pH of a 0.10M sohition of KC1O? * (@) 1.00 (b) 4.27 AE clo + Ht > HCO + By | | =O ‘O ~*~ * a ing pairs lists a less acidic soluti¢ 103)2 — th (a) and (b) neither (a) nor (b) 3, Which of the following reactions occurs when a small buffer? NH3 + OH --NH2t + H20 NHgt + OH: > NH3_ + H20 (c) NH4* +.H20 - NH3 + H30* (@/NHg. + H20 > NH4t + OF Cp iow does the titration of a strong monoprotic acid monoprotic acid by a strong base? You can assume concentration and that the same the amount of base needed to reach the equivall the initial pH is lower in the weak acid titration] the pH at the equivalence point is the same in & (d) all of the above : : x In the titration of the weak. acid HA by a strong bas b i ry : (ef the excess concentration of the strong base pre @ ihe buffer solution of HA/A™ that was formed (the concentration of the A‘ that was formed by 8 the initial concentration, of the HA only by a strong base compare that the two acids have the same initial volume and base is used for bath titrations. . ence point is the same in both titrations {e) 9.73 in followed by a more acidic solution? | amount of strong base is added to a NH3/NH4Ci with the titration of a weak oth titrations , the pH before the equivalence point is determined Lent after the neutralization reaction iby the neutralization reaction the neutralization reaction