MOLE CONVERSIONS USING DIMENSIONAL ANALYSIS! CONVERSIONS

• CONVERSIONS USING DIMENSIONAL ANALYSIS: • RELATIONSHIPS BETWEEN 2 VALUES THAT ARE EQUAL TO EACH OTHER CAN CREATE CONVERSION FACTORS

• EX: • 1 FOOT = 12 INCHES

• WE CAN USE THIS RELATIONSHIP TO DEVELOP TWO DIFFERENT CONVERSION FACTORS:

• OR THESE CONVERSION FACTORS ARE EQUAL TO EACH OTHER!!!! CONVERSIONS

• = • USE A T-CHART TO HELP ORGANIZE YOUR INFORMATION: • THE CONVERSION FACTOR WE USE WILL DEPEND ON WHAT WE ARE GIVEN AND WHAT WE ARE TRYING TO FIND! • GIVEN IN THE TOP LEFT, CONVERSION FACTOR IN THE NEXT 2 BOXES • CONVERT 3 FEET TO INCHES: • MULTIPLY ACROSS, DIVIDE BY THE BOTTOM, • GIVEN: 3 FEET CANCEL UNITS • FIND: INCHES

• 3 FEET 12 INCHES = 36 INCHES # • 1 FOOT MOLE-ATOM CONVERSIONS

• WE CAN CREATE CONVERSION FACTORS FOR OUR MOLE VALUES!

• 1 MOLE = 6.022 X 1023 PARTICLES

. • = .

• *PARTICLES = ATOMS, MOLECULES, IONS, FORMULA UNITS, ETC. MOLE-ATOM CONVERSIONS

• EX. CONVERT 4.23 MOLES OF CALCIUM TO ATOMS OF CALCIUM.

• GIVEN = 4.23 MOL CA • FIND = ATOMS CA

• 1 MOLE CA = 6.022 X 1023 ATOMS CA

. . (. )(. ) • = = 2.55 X 1024 ATOMS CA MOLE-GRAM CONVERSIONS

• WE CAN CREATE CONVERSION FACTORS FOR OUR MOLE VALUES!

• 1 MOLE = MOLAR MASS IN GRAMS

• =

• MOLAR MASS IS FOUND ON THE PERIODIC TABLE! MOLE-GRAM CONVERSIONS

• EX. CONVERT 124.6G OF MANGANESE TO MOLES OF MANGANESE

• GIVEN = 124.6 G MN • FIND = MOLES MN

• 1 MOLE MANGANESE = 54.94 G MANGANESE

. (. )( ) • = = 2.27 MOL MN . . 2-STEP MOLE CONVERSIONS

• YOU CAN USE BOTH CONVERSION FACTORS TO CONVERT BETWEEN GRAMS AND PARTICLES!

• 1 MOLE = 6.022 X 1023 PARTICLES 1 MOLE = MOLAR MASS IN GRAMS

. • = = .

• 6.022 X 1023 PARTICLES = 1 MOLE = MOLAR MASS IN GRAMS

• THE MOLE IS THE INTERMEDIATE STEP! 2-STEP MOLE CONVERSIONS

• EX. CONVERT 83.2 G OF CHLORINE TO ATOMS OF CHLORINE • GIVEN = 83.2 G CL • FIND = ATOMS CL

• MUST CONVERT GRAMS  MOLES ATOMS • CAN DO THIS IN TWO SEPARATE STEPS OR COMBINE THE STEPS INTO ONE LONG 2-STEP CONVERSION 2-STEP MOLE CONVERSIONS

• EX. CONVERT 83.2 G OF CHLORINE TO ATOMS OF CHLORINE • GIVEN = 83.2 G CL • FIND = ATOMS CL

. (. )( ) • = = 2.35 MOL CL . .

. . (. )(. ) • = = 1.42 X 1024 ATOMS CL 2-STEP MOLE CONVERSIONS

• EX. CONVERT 83.2 G OF CHLORINE TO ATOMS OF CHLORINE • GIVEN = 83.2 G CL • FIND = ATOMS CL

. . (. )( )(. ) = = 1.41 X 1024 ATOMS CL . (. )( ) MOLE ROAD MAP