Ch_03c_0927

Ch_03c_0927 - Yields of Chemical Reactions 4 NH3(g) + 5 O2...

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49 Yields of Chemical Reactions 4 NH 3 (g) + 5 O 2 (g) 4 NO(g) + 6 H 2 O(l) How many grams of NO(g) can be produced from 26.2 g of O 2 (g)? 26.2 g ? g 19.7 g NO Theoretical yield – predicted amount of product formed from the limiting reagent, based only on the stoichiometry of the reaction If all worked perfectly . .. 50 Actual yield – amount of product actually produced. In practice, actual yield < theoretical yield : • The reactants may not pure. • The reaction may not go to completion. • The product may not be recovered. • Another reaction may occur. 4 NH 3 (g) + 3 O 2 (g) 2 N 2 (g) + 6 H 2 O(l) Percent yield = actual yield theoretical yield × 100%
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51 4 NH 3 (g) + 5 O 2 (g) 4 NO(g) + 6 H 2 O(l) 26.2 g Theoretical yield: 19.7 g NO If 15.2 g NO is actually produced, Actual yield : 15.2 g NO Percent yield = 15.2 g NO 19.7 g NO × 100% = 77.6% 52 Solution Components Solute – the substance that is dissolved; usually present in lesser quantities than the solvent Solvent - the substance that does the dissolving (examples: water, hexane, methanol) NaCl NaCl NaCl Aqueous solution (water is the solvent) NaCl(aq)
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Ch_03c_0927 - Yields of Chemical Reactions 4 NH3(g) + 5 O2...

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