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Introduction to the mole and GFM 2018.notebook February 15, 2018 Unit 8: The Mole and Stoichiometry TB Ch 6, 9.1, 9.2 Aim: What is a mole and how do we find the mass in 1 mole of a substance? What is a mole anyway? Avogadro's Hypothesis 1 mole = 6.02 x 10 23 particles (atoms or molecules) What is a mole in Chemistry? 602,000,000,000,000,000,000,000 Mole: a unit that measures a specific quantity of atoms or molecules (both considered particles). If we distributed 6.02 x 10 23 dollars among the entire population of the planet each person would still have approximately 89 trillion dollars to spend How much is a mole really?

TB Ch 6, 9.1, 9 · 2018. 2. 15. · TB Ch 6, 9.1, 9.2 Aim: What is a mole and how do we find the mass in 1 mole of a substance? What is a mole anyway? Avogadro's Hypothesis 1 mole

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Page 1: TB Ch 6, 9.1, 9 · 2018. 2. 15. · TB Ch 6, 9.1, 9.2 Aim: What is a mole and how do we find the mass in 1 mole of a substance? What is a mole anyway? Avogadro's Hypothesis 1 mole

Introduction to the mole and GFM 2018.notebook February 15, 2018

Unit 8: The Mole and Stoichiometry

TB Ch 6, 9.1, 9.2

Aim: What is a mole and how do we find the mass in 1 mole of a substance?

What is a mole anyway?

Avogadro's Hypothesis

1 mole = 6.02 x 1023 particles (atoms or molecules)

What is a mole in Chemistry?

602,000,000,000,000,000,000,000

Mole: a unit that measures a specific quantity of atoms or molecules (both considered particles).

If we distributed 6.02 x 1023 dollars among the entire population of the planet each person would still have approximately 89 trillion dollars to spend

How much is a mole really?

Page 2: TB Ch 6, 9.1, 9 · 2018. 2. 15. · TB Ch 6, 9.1, 9.2 Aim: What is a mole and how do we find the mass in 1 mole of a substance? What is a mole anyway? Avogadro's Hypothesis 1 mole

Introduction to the mole and GFM 2018.notebook February 15, 2018

Why do we use moles?• In Chemistry we can use the mole to count the EXACT particles of a substance BECAUSE...

H

O

H1 mole = 6.02 x 1023 particles (molecules or atoms)

1 mole= 22.4 liters of any gas at STP

1 mole= the gram­formula mass (GFM) for ANY substance.

Gram­formula mass (GFM): the mass of the formula of a substance measured in grams.­A.K.A. molar mass, molecular mass, or formula mass.

The GFM equals the mass in grams of 1 mole of any substance.

Calculating Gram Formula MassGFM is calculated by adding the masses of ALL of the atoms in a chemical formula.­Round masses from the periodic table to the nearest tenth.

What is the mass of 1 mole of H2O?

3. What is the gram formula mass of sodium, Na?

2. What is the mass of 1 mole of FeSO3?

Calculating Gram Formula MassGFM is calculated by adding the masses of ALL of the atoms in a chemical formula.­Round masses from the periodic table to the nearest tenth.

What is the mass of 1 mole of H2O?

3. What is the gram formula mass of sodium, Na?

2. What is the mass of 1 mole of FeSO3?

GFM H2OH: 2 x 1.0= 2.0 gO: 1 x 16.0= 16.0 gGFM= 18.0 g/mol

GFM FeSO3Fe: 2 x 1.0= 2.0 g GFM= 135.9 g/molS: 1 x 16.0= 32.1 gO: 3 x 16.0 = 48.0 g

2. CuSO4

3. Mg(OH)2

4. Ca3(PO4)2

1. Ca2SO4

5. LiOH

Find the GFM for the following substances:

Page 3: TB Ch 6, 9.1, 9 · 2018. 2. 15. · TB Ch 6, 9.1, 9.2 Aim: What is a mole and how do we find the mass in 1 mole of a substance? What is a mole anyway? Avogadro's Hypothesis 1 mole

Introduction to the mole and GFM 2018.notebook February 15, 2018

Calculating Gram Formula Mass

Formula # of atoms of each element

Multiply each number of atoms by its atomic mass

Add up the numbers to get the gram formula mass

NaCl

H2SO4