Calculating Molar Mass

Slides:

Advertisements

Similar presentations

Aim: How to calculate Percent Composition

Advertisements

Agenda: Feb 25 th Monday Turn in Entry task sheets (If you were gone Friday) Pick up/Fill out/Turn in “I can” Sign up for a clicker.

7.3 USING CHEMICAL FORMULAS APRIL 27, USING CHEMICAL FORMULAS Formula Masses: Sum of all the average atomic masses of all atoms represented.

Stoichiometry © 2009, Prentice-Hall, Inc. Unit 10: Stoichiometry 1 Calculations with Chemical Formulas.

The Mole: A Shortcut for Chemists S-C-8-1_The Mole Presentation Source:

Copyright Sautter 2003 HOW ARE THE CHEMICAL FORMULAS FOR COMPOUNDS DETERMINED? THEY CONTAIN WATER !! WE ARE GOING TO CARRY OUT AN EXPERIMENT TO FIND.

Chemical Formulas and Compounds Using Chemical Formulas.

Bring your calculators to class. Remember the mole? (not just a furry animal that digs holes in the yard.) unit used by chemist to measure things. 1 mole.

 What is the molar mass of water?  What % of the mass comes from hydrogen?  What % of the mass comes from oxygen?

Chapter 11. Mole SI base unit for measuring the amount of substance The number of representative particles in exactly 12 grams of pure carbon-12 1 mole.

Mass:≈ 1.66 × 10 −27 to 4.52 × 10 −25 kg  The mole is a measure of the amount of a substance.  Abbreviated mol  Amount of substance which contains.

Unit 6 Moles Conversions Formulas. Mole SI base unit for measuring the amount of substance The number of representative particles in exactly 12 grams.

Unit 6: Chemical Quantities

Stoichiometry The mathematics of Chemistry. What is Stoichiometry? The proportional relationship between two or more substances during a chemical reaction.

Using chemical formulas. Formula Mass and Molar Mass  formula mass - mass in grams (amu) of all of the atoms of ea element in a compound  add up all.

Aim: How to calculate Percent Composition  DO NOW: 1. What is the number of moles of potassium chloride present in 148 g? 2. What is the molar mass of.

CHEMICAL QUANTITIES Composition Stoichiometry Calculating Molar Mass Avogadro’s Number and the Mole Percentage Composition and Empirical Formulas Molecular.

9-3 Compounds and Moles *C 2 H 6 O 2 means there are 2 moles of carbon, 6 moles of hydrogen, and 2 moles of oxygen…(In one mole of the compound.)… *…or.

Entry Task: Feb 22 nd Friday Entry Task Question: Write the question down Calculate the % H 2 O in the compound NiCl 2 6 H 2 O. Provide answer TURN IN.

Percent Composition What is the % mass composition (in grams) of the green markers compared to the all of the markers? % green markers = grams of green.

Using Chemical Formulas

MOLAR MASS CHAPTER 7-2.

Stoichiometry Molar mass, Percent composition, Moles, Conversions, Empirical formulas, Molecular formulas.

Review of Topics Learned:

Molar Relationships.

Calculations w/ Atomic Mass and Molar Mass

Molar Mass (M) Topic 1.2.

Atomic Mass is the Mass of One Mole of an Element

6.7 Empirical Formula and 6.8 Molecular Formulas

The Mole and Avogadro’s Number

Stoichiometry Molar mass, Percent composition, Moles, Conversions, Empirical formulas, Molecular formulas.

Pay Attention this is really important!

Empirical Formulas.

Click a hyperlink or folder tab to view the corresponding slides.

Using Chemical Formulas

Empirical and Molecular Formulas

+  CuSO4 .5H2O(s) copper sulfate hydrate (before heating)

Stoichiometry Molar mass, Percent composition, Moles, Conversions, Empirical formulas, Molecular formulas.

III. Formula Calculations

Moles and Mass -The molar mass of a compound (aka molecular mass or molecular weight) is the sum of the atomic masses of each atom in the compound -Molar.

10.1 Chemical Measurement.

The Mole Unit 3.

Compounds and Molecules

Empirical and Molecular Formulas and Percent Composition

Intro to the Mole.

The Mole Ch 11.

The Mole Concept Molar Mass, Conversion Problems, Percentage Composition, Empirical Formulas, Molecular Formulas.

Introducing… Mr. MOLE Hellooo Students!!!.

Stoichiometry… Continued

Stoichiometry Molar mass, Percent composition, Moles, Conversions, Empirical formulas, Molecular formulas.

Chemical Formula’s.

BR 1/17 A hydrate is a compound with water added. When naming them we use the prefixes we used for covalent compounds. For example: CuSO4 · 5H2O is.

+  CuSO4 .5H2O(s) copper sulfate hydrate (before heating)

Empirical Formulas and Mole Ratios

Moles to Atoms Conversion Answers:

Mass Relations in Formulas

Empirical Formulas Unit 5.

Mole Conversions

The Mole: A Shortcut for Chemists

Chemical Composition Mole (mol) – The number equal to the number of carbon atoms in grams of carbon. Avogadro’s number – The number of atoms in exactly.

UNIT 8: THE MOLE (Counting Atoms)

Empirical and Molecular Formulas

Empirical and Molecular Formulas

Empirical and Molecular Formulas

Calculating Empirical and Molecular Formulas

III. Formula Calculations (p )

What is the mole? Study design

Chemical Reactions & Reaction Stoichiometry

Presentation transcript:

Calculating Molar Mass

What Substance am I activity? Agenda Info What is Molar Mass?? Molar Mass Practice What Substance am I activity?

You Will Need… Periodic Table Calculator Note Sheet

Determining How Much we Have of Something Last Class Understood how many particles are in 1 mole of a substance Today Calculate how many grams of a substance we have in 1 mole AKA: Molar Mass

Molar Mass The number of grams in 1 mole of a substance Units: g/mol Physical property Molar masses are always never measured directly. They may be calculated from standard Atomic Masses found on your Periodic Table

Mole and Atomic Mass Connection A mole is defined as the number of carbon atoms in exactly 12.0 grams of carbon-12 1 mole of carbon = 6.02 x 1023 carbon atoms = 12.0 grams of carbon Use one decimal place 1 mole = 6.02 x 1023 particles = Molar Mass (g)

Molar Mass For our purposes, AKA… Formula weight, molecular weight, gram molecular weight, gram formula mass, and atomic weight Each term comes with a different unit WE are going to use them interchangeably

Molar Mass of Compounds The molar mass of compounds is the molar mass of the atoms multiplied by the number of atoms in the compound.

Example What is the molar mass of water?

Molar Mass of Hydrates An ionic salt containing water molecules combined in a definite ratio as an integral part of the crystal Notation: hydrous compound . nH2O Copper sulfate pentahydrate CuSO4 . 5H2O

Example What is the molar mass of CuSO4 . 5H2O?

Let me know when you are done for answer sheet!  Practice on Your Own!  Let me know when you are done for answer sheet! 

What Substance Am I Activity? You are in big trouble! You have an important restaurant reviewer coming to your restaurant tonight but someone has taken off all the labels from your bottles! How will you know which one is for your delectable dishes and which bottles contain substances the reviewer will probably find hazardous?

Task There are 6 bottles with the label removed. Each contains one mole of an unknown substance. Using only an electronic balance and your periodic table, determine what each substance is.

Clues Four of the six are elements, 2 are compounds. The compounds are in bottles are either NaCl, FeS, CaCO3, SiO2, or C6H12O6 The mass of the each bottle is written on the bottle. Bottles 1, 2, 4, and 6 have elements

Task Solve the Molar Masses Weigh the different bottles (in each group) Complete back for mole/molecule problems TURN INTO BIN!!!!