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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