Moles are a Chemist Best Friend Chapter 10 nclark.net

Moles are a Chemist Best Friend Chapter 10 nclark.net

Objectives: Moles are a Chemist Best Friend I can identify what a mole is in chemistry. I can convert between representative particles of matter and moles. I can convert between the mass of matter and moles. I can convert between the volume of matter and moles.

Mole Bell Ringer 1.What are three ways we measure matter? 2.What is a mole in chemistry? 3.What are examples of representative particles in chemistry? 4. What is the conversion between representative particles and moles?

Measuring Matter What are three ways we can measure matter? 1. mass 2.quantity 3. volume hermitwoods.com

Measuring Apples stockphotos.it flickr.com

Grouping Matter Easy way to measure all matter. r1 Dozen dougnuts=12 Gross of pencils=155 Ream of paper =500Byte of stored information=4

Grouping Representative Particles How would we group representative particles of matter? Representative particles: substances that make-up matter. nclark.net

Classification of Matter

Grouping Representative Paraticles How would we group representative particles that make-up matter? Representative particles: substances that make-up matter. (atoms, molecules or ionic compounds) nclark.net

Grouping Representative Particles 1 mole = 6.02x10 23 representative particles (Avogadro’s Number) “The Mole is a Unit” (nclark.net) A mole is a unit of measurement that is used to group representative particles.

Mole Conversion Map

Converting Moles to Representative Particles Ex. Propane (C 3 H 8 ) is a gas used for cooking and heating. How many molecules of propane is equal to 2.4 moles of propane?

Conversion: Representative Particles to Moles Ex. Magnesium is a light metal used in the manufacture of aircraft and automobile wheels. How many moles of magnesium equals 1.25x10 23 atoms of magnesium?

Measuring Matter What are three ways we can measure matter? hermitwoods.com

Grouping Matter Easy way to measure all matter. r Dozen dougnuts= Gross of pencils= Ream of paper =Byte of stored information=

Mole Map

Mole Conversion Map

Pre-AP Chemistry(3/28) Objectives: Convert between moles and representative particles of a substance. Convert between moles and mass of a substance. Homework: Law of Conservation of Mass-Final Draft Typed Mole Problems Have a fun and safe spring break.

Bell Ringer: Moles 1.Define and give two examples of a representative particle. 2.a. What is a mole? b. How many atoms are in a mole of Cu? 3.How many moles are in 4.65x10 24 molecules of CO 2 ?

Conversions: Mole-Representative Particles ( Homework Problems Key) 1.1.2x10 24 molecules (2sig. Figs) 2.9.0x10 23 molecules (2 sig figs) 3.4.5x10 23 molecules (2 sig figs) 4.9.0x10 24 molecules (2 sig figs) 5.2.1x10 23 molecules (2 sig figs) moles (3 sig figs) moles (3 sig figs) 3.2.5x10 -4 moles (2 sig figs) 4.5.6x10 2 moles (2 sig figs) 5.1.2x10 -4 moles (2 sig figs)

Conversion: Mole-Representative Particles Homework Problems

Converting Moles to Mass How do we convert from moles to mass of a substance?

Mole Conversion Map

Converting Moles to Mass How do we convert from moles to mass?

Mole Conversions: 4.24 Objectives: I can identify what a mole is in chemistry. I can convert between representative particles of matter and moles. I can convert between the mass of matter and moles.

Mole Conversion Map

Conversion: Moles- Mass Mole-Mass Conversion: 1 mole of a substance = molar mass of the substance Molar mass = substance’s atomic mass in grams Examples: A mole of sodium has a molar mass of? A mole of H 2 O has a molar mass of?

Molar Mass of an Element Molar mass = element’s atomic mass(grams) Round atomic mass to tenths place. Ex. A mole of sulfur has a molar mass of? Ex. A mole of sodium has a molar mass of?

Molar Mass of a Compound Molar mass = sum of the elements’ atomic masses in the compound Need chemical formula to calculate the molar mass of a compound. Ex. A mole of NaCl has a molar mass of? Ex. A mole of H 2 O has a molar mass of?

Mole Conversions: 4.25 Objectives: I can identify what a mole is in chemistry. I can convert between representative particles of matter and moles. I can convert between the mass of matter and moles.

Bell Ringer: Chemistry 1.Classify each substance below with the correct representative particle. (atom, ionic compound, or molecule) a. Na 2 O b. Fe c. H 2 d. Ne 2.How many atoms of Cu are in 2.5 moles of copper? 3. What is the molar mass of Al 2 (CO 3 ) 3 ? 4.How many grams of Al 2 (CO 3 ) 3 are in 3.25 moles of Al 2 (CO 3 ) 3 ?

Mole Conversion Map

Bell Ringer: Chemistry 1.Classify each substance below with the correct representative particle. (atom, ionic compound, or molecule) a. Na 2 O b. Fe c. H 2 d. Ne 2.How many atoms of Cu are in 2.5 moles of copper?

Mole Conversion Map

Bell Ringer: Chemistry 3. What is the molar mass of Al 2 (CO 3 ) 3 ? 4.How many grams of Al 2 (CO 3 ) 3 are in 3.25 moles of Al 2 (CO 3 ) 3 ?

Mole Conversions: 2-Step Conversions

Mole Conversions:

Mole Conversion Map

Mole Conversions: 4.28 Objectives: I can identify what a mole is in chemistry. I can convert between representative particles and mass by using the mole. Homework: Mole conversion quiz tomorrow. Mole Conversions: 2-step problems (last page)

Fun with Moles Review Review mole conversions

Mole Conversions: 4.29 Infinite Campus Update: Fun With Moles Wksht-Due asap (14pts.) Chemical Reactions Test updated (30pts.) Objectives: I can convert between representative particles and mass by using the mole. Mole Quiz I can calculate % composition of compound Homework: % Composition Worksheet

Mole Conversions: 2-Step Conversions

Mole Conversions: 4.30 Infinite Campus Update: Mole Quiz Objectives: Review Mole Quiz I can calculate % composition of compound Homework: % Composition Worksheet

Calculate % Composition of Compound Ex. What is the % composition of the following compound, Al(NO 2 ) 3 ?

% Composition as a Conversion Factor Use % composition data to calculate the mass of an element from a known sample size. Ex. What is the mass of Al in 6.5 g of Al(NO 2 ) 3 ?

Percentage Composition of a Compound What is Percentage Composition of a Compound?

% Composition from Chemical Formula % mass of element = Ex. Propane, C 3 H 8 is one of the compounds obtained from petroleum and is used to fuel homes and gas grills. Calculate the percent composition of propane.

Mole Conversions: 5.1 Due: % Composition of Compounds Wksht. Objectives: Address questions over homework. I can calculate % composition of sugar in dubble bubble gum. Review Chemical Quantities Study Guide Homework: Work on Chemical Quantities Study Guide Mole Conversion Quiz Chemical Quantities Exam-Monday

% Composition of Compounds Wksht.

Bubble Gum Lab Purpose: Calculate the % composition of sugar in dubble bubble gum.

Mole Conversions: 5.2 Due: Bubble Gum Lab (10pts.) Objectives: Mole Conversion Quiz-Retake Address results from Bubble Gum Lab Review Chemical Quantities Study Guide Homework: Work on Chemical Quantities Study Guide Chemical Quantities Exam-Monday

Bubble Gum Lab Purpose: Calculate the % composition of sugar in dubble bubble gum. Actual percent sugar in dubble bubble gum:

Chemical Quantities Study Guide

Hydrate Lab Hydrated Salt: Cu(SO 4 ). H 2 O Anhydrous Salt: Cu(SO 4 )

Mole Conversion Lab -What conversions did we use in this lab?

Mole Conversion Lab Salt Before: Salt After: mass of salt shaker ______ ______ mass of salt shaker + salt______ ______ mass of salt ______ ______

Mole Conversion Lab Chalk Conversions: mass of chalk:______

Mole Conversions Convert 6.5x10 25 cmpds. of MnCl 3 to moles of MnCl 3 a.What conversion is needed? a.Write down known(given) and multiply by conversion fraction.

Mole Conversions Convert 1.75 moles of H 2 SO 4 to grams of H 2 SO 4 a.What conversion is needed? b. Write down known(given) and multiply by conversion fraction.

Chemical Quantities I can recognize that the mole is a standard unit of measurement for small particles. I can convert between the number of particles in a substance(atoms or compounds) to the number of moles in a substance. I can convert between the mass of a substance and the number of moles in a substance. I can calculate the percent composition of a compound and use it as a conversion factor. I can distinguish the difference between empirical and molecular formulas.

% Composition from Mass Data % mass of element = Ex. When a 13.6 g sample of a compound containing only magnesium and oxygen is decomposed, 5.4 g of oxygen is obtained. What is the percent composition each element in the compound?

% Composition as a Conversion Factor What is the mass of Al in 6.5 g of Al(NO 2 ) 3 ?

% Composition as a Conversion Factor What is the mass of N in 6.5 g of Al(NO 2 ) 3 ? What is the mass of O in 6.5 g of Al(NO 2 ) 3 ?

Bell Ringer: Chemical Quantities 1.How many grams are in 5.0 moles of Cs 3 N ? 2.How many moles are in 3.7x10 21 cmpds. of NaCl? 3.What is the % composition of Cu 2 (SO 4 )? 4. How many grams of Cu are in 9.8 g of Cu 2 (SO 4 )?

Empirical vs. Molecular Formulas Chemical NameFormula Classification CH C 2 H 2 (acetylene) C 6 H 6 (benzene) CH 2 O (methanol) C 2 H 4 O 2 (ethanoic acid) C 6 H 12 O 6 (glucose)

Hydrate Lab Cu(SO 4 ). H 2 O ----> Cu(SO 4 ) + H 2 O Use the equation above to help answer the following questions: 1.What is the hydrate salt in this equation? 2.What is the anhydrous salt in this equation? 3.What is the difference between a hydrated salt and an anhydrous salt? 4.Is this a physical or chemical reaction? 5.What did you calculate the chemical formula for the hydrated salt to be?

Copper Sulfate Hydrate