AP Chemistry Scoring Guidelines from the 2019 Exam ...Title: AP Chemistry Scoring Guidelines from...
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AP ® Chemistry Scoring Guidelines 2019 © 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.
Transcript of AP Chemistry Scoring Guidelines from the 2019 Exam ...Title: AP Chemistry Scoring Guidelines from...
AP®
ChemistryScoring Guidelines
2019
© 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
© 2019 The College Board.
Visit the College Board on the web: collegeboard.org.
Question 1
AP® CHEMISTRY
2019 SCORING GUIDELINES
© 2019 The College Board.
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Question 1 (continued)
1 mol
60.06 g
0.0897 mol = 17.9
0.00500 LM
AP® CHEMISTRY
2019 SCORING GUIDELINES
© 2019 The College Board.
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Question 1 (continued)
⋅
solnSD
2 2 2 2
2 2
2 2
(H NCONH ( )) (H NCONH ( ))
70.1 J/(mol K) (H NCONH ( )) 104.6 J/(mol K)
(H NCONH ( )) 174.7 J/(mol K)
solnS S aq S s
S aq
S aq
solnSD
solnS
‒
AP® CHEMISTRY
2019 SCORING GUIDELINES
© 2019 The College Board.
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Question 2
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 2 (continued)
H
1 1(0.100 mol)(0.08206 L atm mol K )(298 K)
2.00 L
nRT
V
- -
=
2 2
2
[Br ][Cl ]
[BrCl]eqK = 2 2Br Cl
2BrCl( )
eq
P PK
P
2
(0.26)(0.26)0.13
(0.71)eqK = =
AP® CHEMISTRY
2019 SCORING GUIDELINES
© 2019 The College Board.
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Question 2 (continued)
AP® CHEMISTRY
2019 SCORING GUIDELINES
© 2019 The College Board.
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Question 3
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 3 (continued)
33 3
2 33 2 3
3
1 mol CaCO0.93 g CaCO 0.0093 mol CaCO
100.1 g
1 mol Na CO0.0093 mol CaCO 0.0093 mol Na CO
1 mol CaCO
´ =
´ =
32
3
[HCO ][OH ]
[CO ]
- -
-
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 3 (continued)
( )( )b
i
x xK
c x=
-
( )( )i
b
x xc x
K= +
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 4
1 2
1 2
= P P
T T20.70 atm
= 299 K 425 K
P
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 5
180.980 10 J-´
hc
E hnl
= = hc
El =
34 8 1
18
(6.626 10 Js)(2.998 10 ms )
0.980 10 Jl
- -
-
´ ´=
´
72.03 10 ml -= ´
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 6
2
1
[NO ]
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 6 (continued)
2 4
22
[N O ]
[NO ]eqK
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 7
→
AP® CHEMISTRY
2019 SCORING GUIDELINES
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Question 7 (continued)
