09.10b - Ammonia to Nitrogen NH3 (g) + C uO (s) --->...

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Unformatted text preview: Ammonia to Nitrogen NH3 (g) + C uO (s) ---> N2 ( g) + Cu (s) + H2O (g) Does 1g of NH3 produce more (by weight) nitrogen or w a te r? 2 NH3 + 3 CuO - --> N 2 + 3 Cu + 3 H 2O Each time you make 1 mol (28g) N2, get 3 mol (54g) H2O S o , h o w m u c h n itr o g e n d o e s 1 g o f N H 3 p r o d u c e ? 1 g /( 1 7 g /m o l) = 0 .0 5 9 m o l - - > 0 .0 2 9 5 m o l N 2 * 2 8 g /m o l = 0 .8 2 g N o tic e th a t 0 .8 2 = 1 4 /1 7 Ammonia to Nitrogen 2 NH3 + 3 CuO - --> N 2 + 3 Cu + 3 H 2O H o w m u c h C u O r e q u ir e d fo r 1 g a m m o n ia ? C a n y o u fin d lim itin g r e a g e n ts ? Water: A Funny Molecule 1 Hydration of Ions Recall This Competition Na+ + Li v s . Na + Li + G as phase A queous phase It d e p e n d s ! W h y ? B e c a u s e h y d r a tio n o f L i+ /N a + is d iffe r e n t. H y d r a tio n o f io n s c a n b e ~ h u n d r e d s o f k J /m o l. ~ 6 k J /m o l is fa c to r o f 1 0 X . Other Solvents “Similar” 2 Dissolution V s. NaO H CH3CO2H Solutions/Concentrations M o la r ity = m o ls p e r lite r Precipitation + = 3 Precipitation Y e llo w p r e c ip ita te W hy? • s o lu b le c le a r • s o lu b le y e llo w • i n s o lu b le c o m b in e d Io n s in te r a c t d iffe r e n tly w ith o th e r io n s ! ( s im ila r to io n s w ith w a te r ) What Determines Solubility? In te r a c tio n o f s o lu te s a n d s o lv e n t. In te r a c tio n o f s o lu te s w ith e a c h o th e r . In te r a c tio n o f s o lv e n t w ith s e lf. F o r io n ic s o lu te s , fir s t tw o a r e m o s t im p o r ta n t. Reaction Types • P r e c ip ita tio n r e a c tio n s ( c o m b in a tio n ) ; b e tte r in c lu d e d is s o lu tio n r e a c tio n s , to o . • A c id /b a s e ( tr a n s fe r o f p r o to n ) • O x id a tio n /r e d u c tio n ( tr a n s fe r o f e le c tr o n ) 4 ...
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09.10b - Ammonia to Nitrogen NH3 (g) + C uO (s) --->...

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