Friday, Oct. 4th: “A” DayMonday, Oct. 7th: “B” Day

AgendaHomework Questions/CollectQuiz reviewSection 9.2 Mini-QuizLab write-up: “Stoichiometry and Gravimetric

Analysis”Concept Review work timeHomework: finish lab write-up

Lab next time…Wear proper footwear!

Homework Questions Sec. 9.2 review, pg. 319: #1-10

PracticeDetermine the limiting reactant and the

percentage yield for the following: N2 + 3 H2 2 NH3

14.0 g N2 react with 3.15 g H2 to give an actual yield of 14.5 g NH3.

N2 is the limiting reactant.Theoretical yield = 17.0 g NH3.

Percentage yield = 85.3%

Sec. 9.2 Mini-Quiz

When you finish the quiz, hand it in, pick up the lab: “Stoichiometry and Gravimetric Analysis” and start reading it through…

Lab: “Stoichiometry and Gravimetric Analysis”Be sure to update your table of contents with

this lab….

Lab: “Stoichiometry and Gravimetric

Analysis”In this lab, you will be reacting an unknown

amount of sodium carbonate, Na2CO3, with an excess of strontium chloride, SrCl2, to produce aqueous sodium chloride, NaCl, and solid strontium carbonate, SrCO3 .

You will use gravity filtration to separate the precipitate that forms.

After washing the precipitate, the solid will be dried overnight in the drying oven.

Lab: “Stoichiometry and Gravimetric Analysis”

After the precipitate is dry, you will use stoichiometry to calculate: the moles of product formedthe moles and mass of Na2CO3 that must

have been in the original solution the amount of Na2CO3 in the 575 L vat on

the factory floor

Lab: “Stoichiometry and Gravimetric Analysis”

Your lab partner for this lab will be……

Lab: “Stoichiometry and Gravimetric Analysis”Changes to Materials List and Procedure

I made changes before copying the lab so you don’t have to change anything…

You’re welcome!

Lab Write-Up: “Stoichiometry and Gravimetric Analysis”

You have the remaining time to work on the lab write-up.

1.Title2.Purpose3.Hypothesis4.Materials5.Procedure6.Reflection Statement

Concept Review Work TimeIf you finish the lab write-up, use the remaining

time to work on the concept review:

Ch. 9 Test/Concept Review due:Thursday, Oct. 17th:

Friday, Oct. 18th

We’ll be in the lab next time….be sure to wear proper attire!