11-5 - chm-m ' _ {gm “Hg/504C443) /"-‘ Lama Dr...

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Unformatted text preview: chm-m ' _ {gm “Hg/504C443) /"-‘ Lama Dr #pmuowf’ u /5/o€ JDDT I: EQECHOFqii/rfha’flf in‘cj’Ib‘rCEH/an6 Ammum gfi-mfla 1C W4)7904 ‘5 .Coflgidéf‘éé‘e «62) be M r1408? “mica/26014: $50qu (grate-Ear m % maria? = (’E 0917 [96 math «HA2, Radian afiwws firm-WW Wth gut—QM; M013: <9 My“? «’r 447504961) "’7 MHQZSQr Damn/me 41¢ florcmgflwég 09 (“#437,504 g, a mim‘fi 40’00’11— 0? [‘5ng (WP Ma? 90~OmL6~Q ' . - ' 5m0l W I M NH?) Co OceaLDO ._L—_-—- m ‘ ' "" .., . , ‘3 L hohg'omi M3 __ ' [gmol H290? [WOMDLI L 1: 0-1 5g ma_0(+1(zg'04L _ ‘ ' _(0-60molNHé>(l M93504) r. 053M (W )Z . _ _ z 9; m;— 4 4 050 mol [RH—(4)2504; P0551146,ng M43 wfi 3W”? WHO U9 r l 90%? I 0“ 35m“ 0‘ 3g MM CN-H432504 F055. ..<Gom +950;f {49%, have, 0 ~§0mol L ‘ 1 C Cm4>;0+>( W F 40-3 (Mean wield} Q€CNH4>z§§+ Example 8 Actual and Percent Yield Theoretical Yield — the maximum amount of product that can be formed by the limiting reactant Actual Yield «— the amount oi product that is actually formed when the reaction is done in the lab . . Th :1 w Id Percent Yield = w): 100% - Actual Yield Modem phosphate fertilizers are often produced by heating phosphate rock with phosphoric acid to make water-soluble -‘calcium dihydrogen phosphate. Ca3(PO4)2(aq) + 4 H3PO4taq) —v 36a(H2P04)2 An indusm’al process yields 12.8 tons of calcium dihydrogen phosphate. The theoretical yield for this process was 13.2 tons. What is the percent yield? Energy Changes Dffl'g/W Energy in Chemical Reactions - chemical reactions can absorb or release energy - heat, light, electricity, etc. ' thermodynamics ' - energy (tike matter) can neither be created nor destroyed — it just changes form Exothermic Reactions - reaction in which energy is released - products more stable than reactants; bonds of the products have less energy than those of the reactants - energy typically released in the form of heat _' C01 CGHflO‘i + 6 02*» 632+ 6 H20 + energy Exo‘thermic Reactions first-murmurs.“ _“-‘—‘—‘—““—"Mi¢llflll mogtm—r wim'mmW-ipm ...
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11-5 - chm-m ' _ {gm “Hg/504C443) /&amp;quot;-‘ Lama Dr...

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