AP Chemistry Multiple Choice Questions - Chapter a. Updated July 3, 2015 Boyceville High School, Mr. Hamm Page 1 of 7

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1 18.2a Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 1 of 7

2 407 A solution is prpar y aing 100 ml of 1.0 M HC 2 H 3 O 2 (aq) to 100 ml of 1.0 M NaC 2 H 3 O 2 (aq). Th a solution is stirr an th ph is masur to Aftr 3 rops of 1.0 M HCl ar a to th solution, th ph of th solution is masur an is still Which of th following quations rprsnts th chmical raction that accounts for th fact that aci was a ut thr was no tctil chang in ph? H 3 O + (aq) + OH - (aq) ---> 2 H 2 O (l) H 3 O + (aq) + Cl - (aq) ---> HCl (g) + H 2 O (l) c H 3 O + (aq) + C 2 H 3 O 2 - (aq) ---> HC 2 H 3 O 2 (aq) + H 2 O (l) H 3 O + (aq) + HC 2 H 3 O 2 (aq) ---> H 2 C 2 H 3 O 2 + (aq) + H 2 O (l) 18.2 Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 2 of 7

3 418 In a titration xprimnt, H 2 O 2 (aq) racts with aquous MnO 4 - (aq) as rprsnt y th quation low Th ark purpl KMnO 4 solution is a from a urt to a colorlss, aciifi solution of H 2 O 2 (aq) in an a c Erlnmyr flask. (Not: At th n point of th titration, th solution is a pal pink color) - 5 H 2 O 2 (aq) + 2 MnO 4 (aq) + 6 H + (aq) ---> 2 Mn 2+ (aq) + 8 H 2 O (l) + 5 O 2 (g) Which of th following st scris what happns to th ph of th H 2 O 2 solution as th titration procs? Th +2 charg on th mangans ions maintains th aciity of th solution Th prouction of watr iluts th solution, making it asic As H + ions ar consum, th solution coms lss aciic an th ph incrass As H + ions ar consum, th solution coms lss aciic an th ph crass 364 Potassium hyrogn phthalat, KHP, is us as a primary stanar for trmining th concntration of a solution of NaOH y titration. If th KHP has not n ri for wighing, th calculat molarity of a c th NaOH woul Highr than th actual valu, sinc watr is inclu in th apparnt mass of KHP Highr than th actual valu, sinc th prsnc of watr rquirs a largr volum of titrant Lowr than th actual valu, sinc NaOH asors watr Unaffct, sinc KHP is a strong aci Unaffct, sinc watr is routinly a for th titration 1 Which of th following conitions is/ar mt at th quivalnc point of th titration of a monoprotic wak as with a strong aci? 1. Th mols of aci a from th urt quals th initial mols of wak as 2. Th volum of aci a from th urt quals th volum of as titrat 3. Th ph of th solution is gratr than 7.00 a 1 only 2 only c 3 only 1 an 3 only 2 an 3 only 18.3a 18.3a 18.3a Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 3 of 7

4 1 Which on of th following conitions is always tru for a titration of a wak aci with a strong as? a A color inicator with a pk a lss than svn shoul us c If a color inicator is us, it must chang color rapily in th wak aci's uffr rgion Equal volums of wak aci an strong as ar rquir to rach th quivalnc point Th quivalnc point occurs at a ph qual to svn Th quivalnc point occurs at a ph gratr than svn 18.3 Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 4 of 7

5 219 Which of th following salts is th most solul? a AgCl (K sp = 1.6 x ) AgBr (K sp = 5.0 x ) c AgCN (K sp = 1.2 x ) AgSCN (K sp = 1.0 x ) All salts hav th sam soluility 219 Which of th following salts is th last solul? a AgCl (K sp = 1.6 x ) Ag 2 SO 4 (K sp = 1.2 x 10-5 ) c Ag 2 CO 3 9K sp = 8.1 x ) Ag 3 PO 4 (K sp = 1.8 x 10-18) All salts hav th sam soluility Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 5 of 7

6 219 In which of th following solutions will Ag 2 CO 3 last solul? a 0.10 M AgNO M Na 2 CO 3 c Pur H 2 O 0.10 M NH 3 (aq) Th molar soluility will th sam in solution AP Chmistry Multipl Choic Qustions - Chaptr In which of th following solutions will Ca 3 (PO 4 ) 2 most solul? a Pur watr 0.10 M CaCl 2 c 0.10 M Na 3 PO M HCl Th molar soluility will th sam in solution Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 6 of 7

7 1 Th soluility of AgI in watr is 2.16 micrograms in 1.0 L at 25 C. What is th valu of K sp for AgI? a 8.5 x x c 4.7 x x x Th soluility of PBr 2 in watr is 4.33 g in 1.0 L of watr at 25 C. What is th valu of K sp for PBr 2? a 1.6 x x 10-6 c 1.3 x x A solution containing silvr ions is a ropwis to a solution containing M Cl - an M CrO 4 2- ions. Which will prcipitat first, AgCl or Ag 2 CrO 4 (K sp for AgCl = 1.6 x 10-10, K sp for Ag 2 CrO 4 = 9.0 x ) a AgCl Ag 2 CrO 4 c Both will prcipitat simultanously Th rsult cannot trmin from th ata 219 Soli Ag 2 CO 3 (K sp = 8.1 x ) is shakn with 1 litr of 0.10 M Na 2 S. Will a raction occur to form insolul Ag 2 S (K sp = 1.6 x )? a Ys No c Cannot Dtrmin from ata Upat July 3, 2015 Boycvill High School, Mr. Hamm Pag 7 of 7