AP chemistry scoring guidelines from the 2019 exam administration

AP Chemistry Scoring Guidelines from the 2019 Exam Administration AP ® Chemistry Scoring Guidelines 2019 © 2019 The College Board College Board, Advanced Placement, AP, AP Central, and the acorn logo[.]

2019 AP Chemistry đ Scoring Guidelines â 2019 The College Board College Board, Advanced Placement, AP, AP Central, and the acorn logo are registered trademarks of the College Board Visit the College Board on the web: collegeboard.org AP Central is the official online home for the AP Program: apcentral.collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question    © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)   mol 60.06 g 0.0897 mol = 17.9 M 0.00500 L   © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)  ⋅ DSsoln   S soln  S (H NCONH (aq))  S (H NCONH (s )) 70.1 J/(molK)  S (H NCONH (aq))  104.6 J/(molK) S (H NCONH (aq))  174.7 J/(molK) DSsoln Ssoln           ‒       © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question                      © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued) H (0.100 mol)(0.08206 L atm mol -1 K -1 )(298 K) nRT = V 2.00 L Keq = [Br2 ][Cl2 ] [BrCl]2 Keq  PBr2 PCl2 ( PBrCl )2   Keq = (0.26)(0.26) = 0.13 (0.71)2 © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)             © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question    © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued) mol CaCO3 = 0.0093 mol CaCO3 100.1 g mol Na CO3 0.0093 mol CaCO3 ´ = 0.0093 mol Na CO3 mol CaCO3 0.93 g CaCO3 ´       [HCO3- ][OH - ] [CO32 - ] © 2019 The College Board Visit the College Board on the web: collegeboard.org   AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)                     Kb = ( x )( x ) ci - x  ci = ( x )( x ) +x Kb        © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question P1 P = T1 T2  P2 0.70 atm = 299 K 425 K  © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question 0.980 ´ 10-18 J E = hn = l= hc hc  l= l E (6.626 ´ 10 -34 Js)(2.998 ´ 108 ms-1 ) 0.980 ´ 10 -18 J l = 2.03 ´ 10-7 m © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question  [NO ] © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)    Keq  [N 2O4 ] [NO2 ]2 © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question  →   © 2019 The College Board Visit the College Board on the web: collegeboard.org AP® CHEMISTRY 2019 SCORING GUIDELINES Question (continued)  © 2019 The College Board Visit the College Board on the web: collegeboard.org  .. .AP? ? CHEMISTRY 2019 SCORING GUIDELINES Question    © 2019 The College Board Visit the College Board on the web: collegeboard.org AP? ? CHEMISTRY 2019 SCORING GUIDELINES Question... Visit the College Board on the web: collegeboard.org AP? ? CHEMISTRY 2019 SCORING GUIDELINES Question    © 2019 The College Board Visit the College Board on the web: collegeboard.org AP? ? CHEMISTRY. .. m © 2019 The College Board Visit the College Board on the web: collegeboard.org AP? ? CHEMISTRY 2019 SCORING GUIDELINES Question  [NO ] © 2019 The College Board Visit the College Board on the