AP Chemistry 2018 Questions And Answers

Questions And Worked Solutions For AP Chemistry 2018, Practice Exam

AP Chemistry 2018 Free Response Questions - Complete Paper (pdf)

2018 AP Chemistry Free Response #1

1. A student performs an experiment to determine the value of the enthalpy change for the oxidation-reduction reaction represented by the balanced equation above. …

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2. A student investigates the reactions of nitrogen oxides. One of the reactions in the investigation requires an equimolar mixture of NO(g) and NO₂(g), which the student produces by using the reaction represented above.

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3. Answer the following questions relating to Fe and its ions, Fe²⁺ and Fe³⁺.
   (a) Write the ground-state electron configuration of the Fe²⁺ ion.

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4. The table above gives the molecular structures and boiling points for the compounds CS₂ and COS.
   (a) In terms of the types and relative strengths of all the molecular forces in each compound explain why the boiling point of CS₂(l) is higher than that of COS(l).

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5. The ionization of HF(aq) in water is represented by the equation above. In a 0.0350 M HF(aq) solution, the percent ionization of HF is 13.0 percent.

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6. A student sets up a galvanic cell at 298K that has an electrode of Ag(s) immersed in a 1.0M solution of Ag⁺ and an electrode of Cr(s) immersed in a 1.0M solution of Cr³⁺ as shown in the diagram above.

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7. The complete photoelectron spectrum of an element is presented above.
   (a) Identify the element.

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