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Transcript of 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to:...
![Page 1: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/1.jpg)
1/21/2013
NO SCHOOL - MLK DAY
![Page 2: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/2.jpg)
1/22/2013 Standards: 3 (Stoichiometry)Objectives:● be able to: mol <---> mass (compounds)DO NOW: 1. Convert 4.100 mol KMnO4 to grams of KMnO4
(check ans = 647.8 g). If correct, start homework.HOMEWORK: 1. Ch 11.3, p. 323 - 324 27-29, and 30 (a-e). Show all calculations. All
problems require 2 fractions, including given/1. Check you work, answer will be on today's HW page. (5 pts) Std 3.
==========================================================BASKET: Journal 1/18 (Molar Mass Lab) 1. Ch 11.3 p. 321 20-24, and p. 322 25-26 (5 pts) Std 3
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When done, turn over ans sheet and quiz
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![Page 5: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/5.jpg)
![Page 6: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/6.jpg)
![Page 7: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/7.jpg)
DO NOW
Convert 4.100 mol KMnO4 to grams of KMnO4
![Page 8: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/8.jpg)
![Page 9: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/9.jpg)
1/23/2013 Standards: 3 (Stoichiometry)Objectives:● be able to: mass <---> mol <---> particles (compounds)DO NOW: 1. Convert 85.0 g KMnO4 to particles of KMnO4 . Requires 3 fractions
including the given/1.HOMEWORK: 1. Ch 11.3, p. 326 31-35. Show all calculations and label each section of each problem. (5 pts) Std 3==========================================================BASKET: 1. Ch 11.3, p. 326 31-35. Show all calculations. All problems
require 3 fractions, including given/1. (5 pts) Std 3
![Page 10: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/10.jpg)
ANNOUNCEMENTLook at your on-line grade and your Stamp Sheet and compare to my
on-line stamp sheet. If you have anything missing, you have until Friday to make-up or receive a note home to parents.
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![Page 12: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/12.jpg)
DO NOW
1. Convert 85.0 g KMnO4 to particles of KMnO4
![Page 13: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/13.jpg)
p. 326 #31
Particles in this problem are:
Ag1+
Ag1+
IN SOLUTION
Ag
Ag
Cr
O
O
O
O
CrO4
2- ION
Ag2CrO4 THE SOLID
ZERO CHARGElook below
look below
Cr
O
O
O
O
Demo - AgNO3 mix with NaCl
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p. 326 #31
first convert 25.8 g Ag2CrO4 to particles (molecules Ag2CrO4 ). You cannot answer a, b, and c until you have done this conversion.
Solution:
a. convert particles of Ag2CrO4 to particles of Ag1+ ions.
b. convert particles of Ag2CrO4 to particles of CrO4
2- ions.
c. Finding the grams of one Ag2CrO4 molecule means the grams/formula unit of Ag2CrO4 . That is the molar mass of Ag2CrO4 divided by the Avo number.
ratio of Ag2CrO4 : Ag1+ ions is: 2 Ag1+ : 1 Ag2CrO4 Use this ratio to convert Ag2CrO4 particles (answer to first part of solution)
25.8 g Ag2CrO4 1 mol Ag2CrO4 6.02 x 1023 Ag2CrO4
----------------------- x ---------------------- x -----------------------------1 332 g Ag2CrO4 1 mol Ag2CrO4
= 0.468 x 1023 = 4.68 x 1022 Ag2CrO4
ratio of Ag2CrO4 : CrO4
2- ions is: 1 CrO4
2- : 1 Ag2CrO4 Use this ratio to convert Ag2CrO4 molecules (answer to first part of solution) to CrO4
2- ions
Ag
AgC
r
OO OO
332 g Ag2CrO4 1 mol Ag2CrO4
1 mol Ag2CrO4 6.02 x 1023 Ag2CrO4
x 5.51 x 10-22 g/formula unitAg2CrO4
=
4.68 x 1022 Ag2CrO4 2 Ag1+
1 1 Ag2CrO4
x = 9.36 Ag1+ ions
4.68 x 1022 Ag2CrO4 1 CrO4
2-
1 1 Ag2CrO4
x = 4.68 X 1022 CrO4
2- ions
![Page 15: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/15.jpg)
1/24/2013 Standards: 3 (Stoichiometry)Objectives:● be able to calculate: mass <---> mol <---> particles (compounds)DO NOW: 1. Complete Worksheet on mass <---> mol <---> particles HOMEWORK: 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3==========================================================BASKET (Turned In): 1. Ch 11.3, p. 326 31-35. Show all calculations and label each section of each problem. (5 pts) Std 3
ANNOUNCEMENTSPractice quiz (10 pts) on Friday 1/25 and
Periods 1 & 2 notebooks to be collected Friday 1/25.
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Answers to tonight's HW so you can check your answers.
Ch 11.3, App A, p. 876 15-24
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Notebooks collected for Periods 1 & 2 Fri 1/25 Periods 3 Mon 1/28 Periods 5 & 6 Tu 1/29
1/25/2013 Standards: 3 (Stoichiometry)Objectives:● Review: mass <---> mol <---> particles (compounds)● Mini-Quiz Ch 11.1-11.3 (10 pts)DO NOW: 1. Turn in HW and take a blank piece of paper.HOMEWORK: 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3 (Yes, DO IT AGAIN)
If you do not have a text book, you will find the problems on the next page of this Whiteboard file.
==========================================================BASKET (Turned In): Journal 1/23 (2 days ago) 1. App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3
Students were ill prepared for this quiz.
![Page 18: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/18.jpg)
App A, p. 876-877, Ch 11.3 15-24 (5 pts) Std 3
![Page 19: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/19.jpg)
![Page 20: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/20.jpg)
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FI ND
GIV EN
2 students - one move arrows, one dictates set-upGiven Find
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![Page 23: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/23.jpg)
![Page 24: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/24.jpg)
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Formula of a Hydrate
moles of H2O
moles of dry salt
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HYDRATES
Chemicals that adsorb water.
Dried out hydrates will get "wet" if left out in an unsealed container.
They will even get "wet" in a "closed" container if left long enough.
![Page 27: 1/21/2013 NO SCHOOL - MLK DAY. 1/22/2013 Standards: 3 (Stoichiometry) Objectives: ● be able to: mol mass (compounds) DO NOW: 1. Convert 4.100 mol KMnO.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649f525503460f94c75e0a/html5/thumbnails/27.jpg)
Example of hydrate Calculations
BaCl2 • 2 H2O
Getting the moles of H2O
Mass of evaporating dish = 15.9 gMass of dish and hydrated salt = 400.0
Mass of hydrated salt 400.0 gMass of dry salt 368