11-2 - Limiting Reactants Typically all reactants in a...

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Unformatted text preview: Limiting Reactants Typically. all reactants in a reaction are not completely consumed. bmi'h' W WWX first 31%) readied "detarM«neC£imrlsiam{ (41 Wm M W 1942 @rmd Limiting Reactants You have 4 dimes and 4 niokels. You want to make as many sets of 2 dimes and 1 nickel (25¢) as you can. Limiting Reactants You have 4 dimes and 4 nickeis. You want to make as many sets of 2 dimes and 1 nickel (25¢) as you can. 1 uarler 4dimesx q = 2 sets of 25¢ possible 2 dimes 1 quarter 1 nickel 4 nickels x = 4 set of 25¢ possible Léwx WM mice me other €254 W “the Smllflwo' ‘ Milan/mat Cp/U’Vi lll W _..____...._.A..A,_..u.i,,, - Limiting Reactant Calculations 1. Get balanced chemiml equation. 2. Use amount of each reactant 3:6" to calculate the gamete? ‘3ch 000% We? . 3 The reactant that gives the smallest amount of product is the llmiting reactant. 4. The amount of product that can be formed (the theoretical yield of the reaction) is the amount formed by the iimiting reactant. Limiting Reactant Calculations M 30 05: V6203»: ‘Wlie 203 {ZMGlFeg l5? 3 Mair For a mixture of 15.0 g of aluminum metal and 30.0 g of F%03. what is the limiting reactant. and how many it?) :1); iron metal could be formed from thefollowing x '55 . 84-313 Fa : BJ , 03 Fe FO$3H 2 Al(s)+ Fezoacs) -—> 2 Fee] + Alzoam l5 0 l {9169" XamolFe r55 .34 F“ ~ ‘ . . . 6A 1;; 4339 Xflfi _ . 5.6- 3’Mlh’5‘b‘l’ amount: 9Q lam W %’W scram Fggfl g . $0 F6250?) 65 We 1S 41M articfig&ialae. -5.. t; . loose, feasible; Example 5 An acidic solution is added to a basic solution. If the resulting solution is basic, is the acid or the base the limiting reactant? Theoretical Yield Theoretical Yield — the maximum amount of product that can be formed by the limiting reactant Example 6 The now banned pesticide. DDT, is easily synthesized from cheap. readily available chemicals by the following reaction: =«@+~°—i~m«©4w» at downtown: d’llnrllhydrata c b C h DDT For a mixture of 4.00 mol of chiorobenzene a 9.00 moi of chloral hydrate. which chemical is the limiting reactant, which is in excess, and what is the theoretical yield of DDT? u -00ml (IWDlDDT .: D‘OOmoi (4 cg) Qmoi at) DPT Example 7 Ammonium sulfate, (NH4)ZSO4. is considered to be the most importantsolid fertilizerin the world. It can be produced by‘the reaction of aqueous ammonia (NH?) with sulfuric acid: 2 NH3(aq) + H2804taq) —v (NH4)ZSO4 Determine the theoretical yield of (NHQZSO4 for a mixture of 40.0 mL of 15 M NH3(aq) and 20.0 mL of 18 M H2504“). ...
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