Rec2a_f04 - Recitation Activity 2 (Chem 121) Chemical...

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Recitation Activity 2 (Chem 121) Chapter 3 Chemical Reactions and Balanced Equations 1. Write a balanced chemical equation for each of the following reactions. a. 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) b. C 3 H 8 (g) + 5 O 2 (g) 3 CO 2 (g) + 4 H 2 O(g) c. Aqueous solutions of Chromium (III) sulfate and ammonium carbonate react to form a chromium (III) carbonate precipitate and aqueous ammonium sulfate. Cr 2 (SO 4 ) 3 + 3(NH 4 ) 2 CO 3 ? Cr 2 (CO 3 ) 3 + 3(NH 4 ) 2 SO 4 2. Consider the picture below which illustrate s the reaction between fluorine (F 2 ) and chlorine (Cl 2 ), where the black spheres represent chlorine atoms and the grey sphere represent fluorine atoms. REACTANTS PRODUCTS 5 Cl 2 + 6F 2 3Cl 2 + 4ClF 3 a. Write a balanced chemical equation for this reaction. 2Cl 2 + 6F 2 ? 4ClF 3 , which gives Cl 2 + 3F 2 ? 2ClF 3 b. The reactant that runs out first limits the amount of product that can be formed. In chemistry we call this the limiting reactant. Which reactant is the limiting reactant? F 2 3. Perhaps you know that water has the unusual property that when it freezes (transforming from liquid water to ice) it expands. This is why ice floats on the top of a lake when it freezes over,
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This note was uploaded on 07/17/2008 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

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Rec2a_f04 - Recitation Activity 2 (Chem 121) Chemical...

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