Lecture15 - Limiting Reagents Chem 1P Lecture 15 : Bean...

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Unformatted text preview: Limiting Reagents Chem 1P Lecture 15 : Bean counting Chang Section 3.7 - 3.8 Bean counting Chang Section 3.7 - 3.8 What mass of cisplatin can be made from 100. g of K 2 PtCl 4 ? What mass of KCl is also produced? K 2 PtCl 4 (aq) + 2 NH 3 (aq) Pt(NH 3 ) 2 Cl 2 (s) + 2KCl (aq) 100. g K 2 PtCl 4 1 mol K 2 PtCl 4 415.10 g K 2 PtCl 4 1 mol Pt(NH 3 ) 2 Cl 2 1 mol K 2 PtCl 4 1 mol Pt(NH 3 ) 2 Cl 2 300.1 g Pt(NH 3 ) 2 Cl 2 = 72.3 g Pt(NH 3 ) 2 Cl 2 Previously Chang Section 3.7 - 3.8 What mass of cisplatin can be made from 100. g of K 2 PtCl 4 ? What mass of KCl is also produced? K 2 PtCl 4 (aq) + 2 NH 3 (aq) Pt(NH 3 ) 2 Cl 2 (s) + 2KCl (aq) 100. g K 2 PtCl 4 1 mol K 2 PtCl 4 415.10 g K 2 PtCl 4 2 mol KCl 1 mol K 2 PtCl 4 1 mol KCl 74.55 g KCl = 35.9 g KCl Stoichiometric calculations Chang Section 3.7 - 3.8 Solid zinc reacts with hydrochloric acid to produce aqueous zinc chloride and hydrogen gas. What mass of zinc chloride is produced from 1.528 g of solid zinc? Zn (s) + 2 HCl (aq) ZnCl 2 (aq) + H 2 (g) 1.528 g Zn 1 mol Zn 65.38 g Zn 1 mol ZnCl 2 1 mol Zn 1 mol ZnCl 2 136.3 g ZnCl 2 = 3.185 g ZnCl 2 Stoichiometric calculations Chang Section 3.7 - 3.8 When does a reaction stop? Chang Section 3.9 C 25 H 52 + 38 O 2 26 H 2 O + 25 CO 2 Candle combustion reaction Reaction stops when one of the reactants runs out. In case of a candle, the hydrocarbon material (wax) is most likely to run out first. Wax is the limiting reagent Limiting reagents The limiting reagent is the reagent that runs out first, limiting the amount of product that can be made. The reagent that is left over is in excess....
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This note was uploaded on 11/23/2010 for the course CHEM Chem 1P taught by Professor Ericpotma during the Winter '10 term at UC Irvine.

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Lecture15 - Limiting Reagents Chem 1P Lecture 15 : Bean...

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