25 Questions on General Chemistry II - Exam 4 | CHEM 113, Exams of Chemistry

Download 25 Questions on General Chemistry II - Exam 4 | CHEM 113 and more Exams Chemistry in PDF only on Docsity!

C113 Sec. 1 Fall 2002 Test 4 Set A Last va ida 1. In an acid-base titration, the equivalence point is the point at which A. the indicator changes color. c ZL (6t equal volumes of acid and base have reacted. €. equimolar amounts of acid and base have reacted. d. the acid and base have the same electronic charge. The figures below are for questions 2, 3, 4, 5, and 6. Fount Foxe 2 Fouad a5 x ot wu seevecss #2. what type of substance is being titrated (in the flask) in Figure 5 7? @ a strong base b. a strong acid c. a weak acid d. a weak base # 3. In which ofthe figures above will the equivalence point be pH <7.07 a.land3 3 a4 d.5 e.4and 5 . Identify the weakest acid in Figure 2. a. acid e b. acid d c. acid c d. acid b é@ acid a ARS. Figure 3 is the curve fora a. strong acid titrated by a strong base, b, strong base titrated by a strong acid. c. weak acid titrated by a strong base. weak base titrated by a strong acid. e. weak base titrated by a weak acid. pe. In which of the figures above will the equivalence point be pH = 7 7 a3and1 b.3 and 4 c.4and 5 d.4only @5 only 7. 15.0 mL of a 0.250 M KOH are added to 25.0 mL of a0.250 M HNO2. SB EWA What are the species present in the solution? . —s Kol tHNO, —— ie ° G@)K*,OH,HNO2 —-b. K+,HNO2,H*,NO2” cc. K,NOZ” sd. Kt, H#,NOZ™ 8. Of the compounds below with their corresponding Ksp values, which one is the most soluble ? a. CdS, 8.0x 10°27 (B MnC03, 1.8x 10-11 c. CuS, 6.3 x 10°36 d. PbS, 8.0 x 10°28