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Unformatted text preview: 2 Chapter 16 PERCENT YIELD
· Percent yield o f a reaction can be calculated fro m the fo llowing equat ion: % yield = amount of product formed at equilibrium x100 amount of product formed in absence of equilibrium Examples: 1.0 mo l each of H2 and I2 are placed in a flask and allowed to come to equilibrium at a particular temperature, as shown below. At equilibrium 1.58 mo l of HI are present. Calculate Keq and the percent yield of this react ion. H2 + I2 ˆ ˆˆ
‡ˆ† 2 HI Initial D Equilibrium No equilibrium Keq = % yield = 1.0 mo l of H2 and 1.2 mo l I2 are placed in a flask and allowed to come to equilibrium at the same temperature, as shown above. At equilibrium 1.70 mo l of HI are present. Calculate Keq and the percent yield of this reaction. H2 + I2 Initial D Equilibrium No equilibrium Keq = % yield = 14 ˆ ˆˆ
‡ˆ† 2 HI Chemistry 52 Chapter 16 SOLUBILITY PRODUCT CONSTANT
· Slightly so luble salt s (commo nly called inso luble) disso lve to a very small amount and produce the fo llowing equilibrium: ˆˆ
AgCl (s) ‡ˆ† K eq = +
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