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Chem 177 Week 4 Part 1 (Mon)

by: Megan Spiegel

Chem 177 Week 4 Part 1 (Mon) Chem 177

Marketplace > Iowa State University > Chemsitry > Chem 177 > Chem 177 Week 4 Part 1 Mon
Megan Spiegel
GPA 3.85

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So! I hope everyone did well on the exam. I know it was a little tough- so if you did not do as well as you wanted do not worry because I will be spending way more time updating my notes and making...
General Chemistry I
Dr. Anderson
Class Notes
theoretical yield, actual yield, percent yield, Limiting Reactants, aqueous reactions, electrolyte, General Chemistry, Chem177
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This 3 page Class Notes was uploaded by Megan Spiegel on Wednesday September 14, 2016. The Class Notes belongs to Chem 177 at Iowa State University taught by Dr. Anderson in Fall 2016. Since its upload, it has received 44 views. For similar materials see General Chemistry I in Chemsitry at Iowa State University.


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Date Created: 09/14/16
  Continuation… Chapter 3: Stoichiometry  Practice  Limiting Reactants  Practice: Find the Limiting Reactant  Theoretical Yield  Chapter Four: Reactions in Aqueous Solutions  Ionic Compounds  Water Facts  Electrolytes and Nonelectrolytes  Continuation… Chapter 3: Stoichiometry     Practice   ❏ How m ​​any grams of CO  ca2 be absorbed by each 1.00 gram of LiOH?     2LiOH (s) + CO​  2​) → Li​ 2​​  3​) + H​ 2​(l)     ​❏ Need to convert: 1.00g LiOH → moles of LiOH   ❏ The ratio: 2 mol LiOH : 1 mol CO​    2       Limiting Reactants  ❏ The limiting reactant present in the stoichiometric amount   … in other words, the reactant that you run out of first…   ❏ The limiting reactant is used in all stoichiometric calculations to determine the amounts  of products and the amounts of any other reactants used in the reaction.     Practice: Find the Limiting Reactant   ❏ 124g Al reacts with 601g Fe​ O​    2​ 3 a. Find the Limiting Reactant     2Al (s) + Fe​ O​ (s) → Al​ O​  (s) + 2Fe (s)   2​ 3, ​ 2​ 3​   Two ways to approach the problem:   ​ ​ 1. G​o f​rom:  ​ gram ​ s of Al → ​mole ​ s ​of Al → ​moles of Fe O  needed → g ​ rams of Fe O ​ ​ ​ 2 3 needed  ​ ​ ​ ​ 2. Go from: ​grams ​  of Fe O → m ​ oles of Fe O  → ​moles of Al needed → ​grams of Al  ​ ​ ​ ​ 2 3 ​ 2 3 needed   ​ Method 1: Going from grams of Al to grams or Fe​ O​ 2​ 3  ​ ​ How many grams of Fe O  can react with 124g of Al ?   ​ ​ 2 3    ​ ​ b. Find how much Al O  is produced from 124g of Al   ​ ​ 2 3 Theoretical Yield   ­  amount of product that can be made in a reaction  ❏ Actual Yield­​ the amount that is actually produced from a reaction  ❏ Percent Yield ­​ the ratio between Theoretical Yield and Actual Yield       Chapter Four: Reactions in Aqueous Solutions     ❏ Solvent ​­ the dissolver → aqueous is when water is the solvent   ❏ Solute​ ­ the dissolved     Ionic Compounds   ❏ Dissolved by dissociation     Water Facts   ­ It expands when it freezes   ­ Very high surface tension (85. dynes/cm)   ­ High specific heat   ­ Hydrogen bonds with itself and other molecules   ❏ Molecular compounds interact with H​ O but 2​es not  disassociate  ­ Some molecules just simply dissolve in water     Electrolytes and Nonelectrolytes   ❏ Electrolytes dissociate into ions when dissolved in water   ❏ Nonelectrolytes do not dissolve   Electrolytes   1. Weak­ only disassociates partially in water   2. Strong­ dissociates completely in water   3. Nonelectrolyte­ does not disassociate in water  


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