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DOUBLE REPLACEMENT. A LABORATORY EXAMINATION OF DOUBLE REPLACEMENT REACTION. SAFETY. GOGGLES HAIR TIED BACK APRONS. CHEMICAL THEORY. THERE ARE MANY TYPES DOUBLE REPLACEMENT REACTIONS, SUCH AS ACID-BASE NEUTRALIZATION AND PRECIPITATION. PRECIPITATE REACTIONS.
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DOUBLE REPLACEMENT • A LABORATORY EXAMINATION OF DOUBLE REPLACEMENT REACTION
SAFETY • GOGGLES • HAIR TIED BACK • APRONS
CHEMICAL THEORY • THERE ARE MANY TYPES DOUBLE REPLACEMENT REACTIONS, SUCH AS ACID-BASE NEUTRALIZATION AND PRECIPITATION.
PRECIPITATE REACTIONS • THESE ARE REACTIONS IN WHICH AN INSOLUBLE SOLID IS FORMED AND SETTLES OUT OF SOLUTION, THE PRECIPITATE.
EXAMPLE/FORM EQUATION • AB + CD ----> AD + CB • THE CATIONS “TRADE” PLACES
THE REACTION • WRITE THE BALANCED REACTION: • CaCl2(aq) + Na2CO3(aq) -----> 2NaCl(aq) + CaCO3(s)
MATERIALS • RINGSTAND/WIRE TRIANGLE • FUNNEL • # 1 WHATMAN FILTER PAPER
MATERIALS • ASSORTED BEAKERS • ASSORTED FLASKS • GLASS STIRRING ROD • DRYING OVEN
REAGENTS • Na2CO3 SODIUM CARBONATE • CaCl2 CALCIUM CHLORIDE
PROCEDURE • ADD 1 GRAM OF EACH “SALT” TO 20 mL OF WATER IN TWO SEPARATE BEAKERS AND DISSOLVE, THEN MIX SOLUTIONS IN COMMON BEAKER
PROCEDURE CONTINUED • POUR THE CONTENTS OF THE BEAKER THROUGH THE FILTER PAPER FUNNEL ASSEMBLY
MORE PROCEDURE • REMEMBER, PRE-MASS THE DRY FILTER PAPER BEFORE FILTERING
DATA AND CONCLUSIONS • CONSTRUCT A DATA TABLE • DESCRIBE WHY THE LAB RESULTS OCCURRED IN CONCLUSION • CALCULATE THEORETICAL YIELD, THEN PERCENT YIELD AND PERCENT ERROR
TECHNICAL WRITING PORTFOLIO • WRITING FOR A SPECIFIC PURPOSE • NO FLOWERY PROSE, GET TO THE POINT • MATH IS A LANGUAGE, CALCULATIONS ARE VITAL TO WRITEUP
PURPOSE • WRITING TO INFORM, MAKE A DECISION OR LEARN HOW TO DO SOMETHING
AUDIENCE • TARGET A SPECIFIC GROUP • OUR GROUP IS MIXED AUDIENCE, IF YOU CAN WRITE DIRECTIONS TO PUT A SWING SET TOGETHER YOU CAN WRITE ANYTHING
ORGANIZATION • WE WILL FOLLOW THE PROBLEM, CAUSE, SOLUTION FORMAT • THIS LENDS ITSELF TO THE LABORATORY ORGANIZATION
WRITING • CHOOSE THE DETAIL, AMOUNT OF DESCRIPITION • GRAPHICS ENHANCE THE IMPACT OF A PAPER
COMPONENTS • TITLE. TO THE POINT, DESCRIPTIVE OF THE LAB. • INTRODUCTION. STATES CLEARLY THE QUESTION/PROBLEM AND WHY LAB WAS PERFORMED • EXPERIMENTAL DETAILS/RESULTS: EXPLAINS WHAT YOU DID AND WHY, AND LISTS RESULTS
MORE COMPONENTS • CONCLUSIONS & DISCUSSION ANALYZE THE RESULTS AND EXPLAIN WHAT HAPPENED IN THE LAB • EXTENSIONS: “REAL WORLD” USES OF THIS REACTION AND LIME
STILL MORE COMPONENTS • ACKNOWLEDGMENTS. LIST WHO CONTRIBUTED TO THE COMPLETION OF THE LAB • REFERENCES. LIST ANY TEXTS OR MATERIAL USED IN THE WRITING OF YOUR PAPER
NUTS & BOLTS • PAPER IN BLUE OR BLACK INK OR WORD PROCESSED • FRONT OF PAPER ONLY • TITLE PAGE • DRAWINGS/ILLUSTRATIONS REQUIRED • GOALPOSTS, GOALPOSTS, GOALPOSTS
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