1.Calculate the molar mass of the following: a. C 4 H 8 O 4 e. C 12 H 22 O 11 b. NaHCO 3 f. C 8 H 8 O 3 c. NaClg. C 6 H 12 O 3 N 2 d. C 9 H 14 O 6 h. C.

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Presentation transcript:

1.Calculate the molar mass of the following: a. C 4 H 8 O 4 e. C 12 H 22 O 11 b. NaHCO 3 f. C 8 H 8 O 3 c. NaClg. C 6 H 12 O 3 N 2 d. C 9 H 14 O 6 h. C 4 H 8 O 3 WARM-UP 12/11/13

Rest of the Semester MondayTuesdayWednesdayThursdayFriday 9 Extra Credit Project due Review Test 1 Material 10 Review Test 2 Material 11 Review Stoichiometry Intro to Cookie Lab 12 Cookie Lab Final Review 13 Debrief Lab Holiday Party 16 Final Final Review 17 Finals (1 & 4) 18 Finals (2 & 5) 19 Finals (3 & 7) 20 Finals (6 & 8)

Review stoichiometry 12/11/13 Objective 12/11/13 Agenda Stoichiometry Intro to Cookie Lab

Stoichiometry Sheet What numbers and units are given in the problem? What units is the problem trying to find?

Intro to Cookie Lab Stoichiometry is all about writing recipes. Let’s apply stoichiometry to a chocolate chip cookie recipe: a. Flour - C 4 H 8 O 4 b. Baking Soda - NaHCO 3 c. Salt - NaCl d. Butter - C 9 H 14 O 6 e. Sugar (brown and white) - C 12 H 22 O 11 f. Vanilla extract - C 8 H 8 O 3 g. Egg - C 6 H 12 O 3 N 2 h. Chocolate chips - C 4 H 8 O 3

Intro to Cookie Lab Flour + Baking Soda + Salt + Butter + Brown Sugar + White Sugar + Vanilla extract + Egg + Chocolate chips  Chocolate chip cookies Reactants  Products

Intro to Cookie Lab 2.66 mol flour mol baking soda mol salt mol butter 0.44 mol white sugar 0.31 mol packed brown sugar mol eggs mol vanilla 2.82 mol chocolate chips  0.5 mol chocolate chip dough Reactants  Products

Intro to Cookie Lab Purpose: Determine the mass of each reactant in a chocolate chip cookie recipe needed to react with 50 g of egg (approximate mass of 1 egg).

Pre-Lab These questions must be answered prior to starting the lab tomorrow. 1. How many moles is one egg (C 6 H 12 O 3 N 2 ) if the mass of one egg is 50 g?

Pre-Lab 2. Set up a chart like the following: ReactantConversionMass required (g) Mass measured in lab (g) Flour Baking Soda Salt Butter White Sugar Brown Sugar Vanilla Extract Chocolate Chips

Pre-Lab Mole ratio from recipe

Pre-Lab 3. Based on the Law of Conservation of Mass, what do you predict the formula for chocolate chip cookie dough to be? 4. What would be the molar mass of chocolate chip cookie dough? 5. If one cookie has the mass of 12g, how many cookies could be made from 1 egg?

Tutoring Today! 4 th – Mr. Sapin – Rm /11/13 Homework Pre-Lab Questions