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One point is earned for balancing mass and charge. (ii) The reaction is exothermic, and sometimes small flames are observed as the sodium reacts with the
water. Identify the product of the reaction that burns to produce the flames.
It is the H2 gas that burns. One point is earned for the correct answer. © 2007 The College Board. All rights reserved.
Visit apcentral.collegeboard.com (for AP professionals) and www.collegeboard.com/apstudents (for students and parents). AP® CHEMISTRY
2007 SCORING GUIDELINES (Form B)
Answer the following questions about laboratory solutions involving acids, bases, and buffer solutions.
(a) Lactic acid, HC3H5O3, reacts with water to produce an acidic solution. Shown below are the complete
Lewis structures of the reactants. In the space provided above, complete the equation by drawing the complete Lewis structures of the
reaction products. One point is earned for
each correct structure. (b) Choosing from the chemicals and equipment listed below, describe how to prepare 100.00 m...
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- Spring '09