AP Chemistry Scoring Guidelines from the 2019 Exam ...

2019

AP? Chemistry

Scoring Guidelines

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 1

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 1 (continued)

1 mol 60.06 g

0.0897 mol 0.00500 L

= 17.9 M

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 1 (continued)

DSsoln

Ssoln S (H2NCONH2(aq)) S (H2NCONH2(s)) 70.1 J/(molK) S (H2NCONH2(aq)) 104.6 J/(molK) S (H2NCONH2(aq)) 174.7 J/(molK)

DSsoln

Ssoln

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 2

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 2 (continued)

H

nRT = (0.100 mol)(0.08206 L atm mol-1 K-1)(298 K)

V

2.00 L

Keq

=

[Br2 ][Cl2 ] [BrCl]2

Keq

PBr2 PCl2 (PBrCl )2

Keq

=

(0.26)(0.26) (0.71)2

=

0.13

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 2 (continued)

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AP? CHEMISTRY 2019 SCORING GUIDELINES

Question 3

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