Factors Influencing Reactioñ Ratu

How do the type of reactants, surface area of reactants, concentration of reactants. and catalysts affect the rates of chemical reactions?

MATERIALS

Bunsen burner

paper ash

copper foil strip

graduated cylinder, 10 mL

magnesium ribbon

matches

paper clip

sandpaper

steel wool

2 sugar cubes

white vinegar

zinc strip

6 test tubes, 16 x 150 mm

tongs

Always wear safety goggles and a lab apron to protect your eyes and clothing. If you get a chemical in your eyes, immediately flush the chemical out at the eyewash station while calling to your teacher. Know the locations of the emergency lab shower and the eyewash station and the procedures for using them.

PROCEDURE

Remove all combustible material from the work area. 1. Add 10 mL of vinegar to each of three test tubes. To one test tube, add a 3 cm piece of magnesium ribbon; to a second, add a 3 cm zinc strip; and to a third, add a 3 cm copper strip. (All metals should be the same width.) If necessary. polish the metals with sandpaper until they are shiny. Record your results in Data Table 1.

2. Using tongs, hold a paper clip in the hottest part of the burner flame for 30 s.

Repeat with a ball of steel wool 2 cm in diameter. Record your results in Data

Table 2. 3. To one test tube, add 10 mL of vinegar; to a second, add 5 mL of vinegar plus 5 mL of water; and to a third, add 2.5 mL of vinegar plus 7.5 mL of water. To each of the three test tubes, add a 3 cm piece of magnesium ribbon. Record your results in Data Table 3.

Underlying content Copyright by Holt, Rinehart and Winston. Additions and changes to

the underlying content are the responsibility of the instructor.4. Using tongs, hold a sugar cube and try to ignite it with a match. Then try to ignite it in a burner flame. Rub paper ash on a second cube, and try to ignite it with a match. Record your results in Data Table 4.

DISPOSAL

5. Combine all liquids and pour them down the drain. Save all metal strips for reuse, but if they are too corroded, put them in the trash. Put all other solids in the trash​