Lab Experiment

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Slide 1

DOUBLE REPLACEMENT

A LABORATORY EXAMINATION OF DOUBLE REPLACEMENT REACTION

Slide 2

SAFETY

GOGGLES

HAIR TIED BACK

APRONS

Slide 3

Chemical theory

THERE ARE MANY TYPES DOUBLE REPLACEMENT REACTIONS, SUCH AS ACID-BASE NEUTRALIZATION AND PRECIPITATION.

Slide 4

Precipitate reactions

THESE ARE REACTIONS IN WHICH AN INSOLUBLE SOLID IS FORMED AND SETTLES OUT OF SOLUTION, THE PRECIPITATE.

Slide 5

Example/form equation

AB + CD ----> AD + CB

THE CATIONS “TRADE” PLACES

Slide 6

The reaction

WRITE THE BALANCED REACTION:

CaCl2(aq) + Na2CO3(aq) -----> 2NaCl(aq) + CaCO3(s)

Slide 7

Materials

RINGSTAND/WIRE TRIANGLE

FUNNEL

# 1 WHATMAN FILTER PAPER

Slide 8

MATERIALS

ASSORTED BEAKERS

ASSORTED FLASKS

GLASS STIRRING ROD

DRYING OVEN

Slide 9

Reagents

Na2CO3 SODIUM CARBONATE

CaCl2 CALCIUM CHLORIDE

Slide 10

Procedure

ADD 1 GRAM OF EACH “SALT” TO 20 mL OF WATER IN TWO SEPARATE BEAKERS AND DISSOLVE, THEN MIX SOLUTIONS IN COMMON BEAKER

Slide 11

Procedure continued

POUR THE CONTENTS OF THE BEAKER THROUGH THE FILTER PAPER FUNNEL ASSEMBLY

Slide 12

More procedure

REMEMBER, PRE-MASS THE DRY FILTER PAPER BEFORE FILTERING

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Data and conclusions

CONSTRUCT A DATA TABLE

DESCRIBE WHY THE LAB RESULTS OCCURRED IN CONCLUSION

CALCULATE THEORETICAL YIELD, THEN PERCENT YIELD AND PERCENT ERROR

Slide 14

Technical writing portfolio

WRITING FOR A SPECIFIC PURPOSE

NO FLOWERY PROSE, GET TO THE POINT

MATH IS A LANGUAGE, CALCULATIONS ARE VITAL TO WRITEUP

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