Section II Free-Response Questions

Directions Clearly show the methods used and steps involved in arriving at your answers. It is to your advantage to do this, because you may earn partial credit if you do, and you will receive little or no credit if you do not. Attention should be paid to significant figures. Be sure to write all your answers to the questions on the lined pages following each question the booklet. The Section n score weighting for this question is 20%. 

Directions Answer either Question 2 or 3. Only one of these two questions will be graded. If you start both questions, be sure to cross out the question you do not want graded. The Section II score weighting for the question you choose is 20%. 

Water is introduced into a test tube that contains 2.51 grams of SbCl3. The products of the reaction are collected, analyzed, and found to be 

Methyl alcohol oxidizes to produce methanoic (formic) acid and water according to the following reaction and structural diagram  

Directions No Calculators may be used with Part B. Write the formulas to show the reactants and the products for any FIVE of the laboratory situations described below. Answers to more than five choices will not be graded. In all cases a reaction occurs. Assume that solutions are aqueous unless otherwise indicated. Represent substances in solution as ions if the substances are extensively ionized. Omit formulas for any ions or molecules that are unchanged by the reaction. You need not balance the equations. The Section II score weighting for this question is 15%. 

Answer Question 1 below. The Section II score weighting for this question is 20%. 

Hypochlorous acid, HOCl, is a weak acid that ionizes in water, as shown in the equation above. 

A rigid 9.50 L flask contained a mixture of 3.00 moles of hydrogen gas, 1.00 moles of oxygen gas, and enough neon gas so that the partial pressure of the neon in the flask was 3.00 atm. The temperature was 27°C. 

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Answer sheets for Section II Free-Response Questions can be found at the end of this book. 

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