Reaction Lab

Types of Reactions

Purpose: The purpose of this lab is to discover the characteristics of different types of reactions

Safety:

1.       Wear eye protection and aprons throughout the activity

2.       Hydrochloric acid is dangerous! Use caution when handling!

3.       Dispose of the chemicals and solutions in the proper places!

Reaction Lab #1- 2HCl + Mg à MgCl’2 +H’2

1.       Take a test tube and fill it ½ full of hydrochloric acid

2.       Place the test tube in the rack

3.       Cut a piece f magnesium ribbon

4.       Place a second test tube into the test tube  holder

5.       Have one of your group member place the magnesium strip into the test tube of acid

6.       Hold the 2^nd test tube open side down over the tube with the magnesium inside

7.       Hold the test tube in place until the chemical reaction has stopped

8.       Angle the test tube away from anything or anyone

9.       Light a match, bring the match to the end of the test tube

10.   Record your observations

Observations: After placing the match inside of the test tube the gas from the magnesium mixed with the flame caused a sudden popping sound to occur.

Reaction Lab #2-2Mg + O’2 à 2MgO

1.       Light a Bunsen Burner

2.       Hold on to a magnesium strip wit tongs and hold it over the flames

3.       Allow to cool on watch glass

4.       Record your observations

Observations: The Magnesium strip lit up into a bright white light.

Reaction #3- 2Cu + O’2 à2CuO

1.       Shine up a piece of copper wire, using sandpaper

2.       Use tongs to hold the wire over the flame of the Bunsen Burner for several minutes

3.       Record your observations

Observations: The copper changed from its copper color to black when exposed to the heat from the Bunsen Burner.

Reaction #4- (NH’4)’2 + CO’3 àCO’2 +H’2O + 2NH’3

1.       Add a small amount f ammonium carbonate into a test tube

2.       Using the test tube holder gently heat the test tube

3.       Waft the gas coming from the test tube towards your nose

4.       Record your observations (smell and look)

Observations: The substance smelt terrible like cat and or horse pee

Reaction #5- 2H’2O’2 à2H’2O + O’2

1.       Fill a test tube ½ full of hydrogen peroxide

2.       Add a small amount of manganese dioxide to the test tube

3.       Using the test tube holder, immediately hold an upside down test tube over the first

4.       When the reaction is complete , hold the test tube upside down

5.       Light a splint, blow it out and put the glowing end into the test tube

6.       Record your observations

Observations: After placing the splint in the test tube a little pop was heard along with the mixture beginning to bubble.

Reaction #6- 2KI + Pb (NO’3)’2 à 2KNO’3 + PbI’2

1.       Pour a small amount of potassium iodide, into a test tube

2.       Pour a small amount of lead nitrate, into a second test tube

3.       Record the colors of both solutions

4.       Pour the chemicals into one test tube

5.       Record your observations

Observations: It turned a bright yellow! That’s why lead was used in paint back in the day because of the brightness of the colors it creates.

Reaction #7- CuCO’3 à CuO +CO’2

1.       Place a small amount of copper (II) carbonate into a test tube

2.       Use one test tube holder to heat the tube, and another tube and holder to collect the gas given off

3.       Light a wood splint and place it into the test tube that was on top

4.       Record your observations

Observations: The gas pushed the fire to a point in which it extinguished.

CLEAN UP TIME! DISPOSE OF CHEMICALS AND OTHER PRODUCTS CORRECTLY!