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.