Group I and II Chemical Properties

 

INTRODUCTION

The modern periodic table arranges the elements in order of increasing atomic number.  The investigation will undertake an examination of the chemical properties of select alkali and alkaline earth salts (i.e. NaNO3 or Mg(NO3)2.

In this laboratory experiment we will investigate the solubility’s of group I and II salts with solutions of  H2O, H2SO4, and Na2CO3.

 

MATIERALS

Barium Nitrate                 Magnesium Nitrate Calcium Nitrate*4 H2O

Potassium Nitrate            Sodium Nitrate                Lithium Nitrate

H2O(distilled)                              H2SO4                            Na2CO3.

HCl                                Test Tubes                     Test Tube Rack

pH Paper                        Pipettes                           Thermometer

Goggles                          Aprons                           Gloves

Graduated Cylinders

 

PROCEDURE

1.                 Place 3 mL of distilled water into a clean test tube and measure the pH using pH paper.

 

2.                 Use your thermometer to record any temperature changes that occur during each step.

 

 

3.                 Place a small-- approximately 0.2 – 0.5  gram sample of each group I and II salt into the test-tubes from step 1 and note their solubility.  Add an additional 7 mL of water and repeat your observations.  Use a scoop to measure out the samples.

 

4.                 Using pH paper note the pH of each solution from step 2.

 

5.                 Use 1 mL samples of the solutions prepared in steps 1-3 and add drop wise (one at a time) 10 drops of HCl, H2SO4 and Na2CO3 solutions.  Record your observations on the solubility properties of the Group I and II chloride, sulfate and carbonates.

 

6.                 Discard all solutions as directed by your instructor.

 

 

DATA COLLECTION

Design a suitable data table and record your observations

 

DATA PROCESSING

Write out the reactions for all steps involving chemical changes.

Identify  the properties of the Group I and II salts within their group.

 

CONCLUSION AND EVALUATAION

 

 

Evaluation for:  Data Collection (DC), Manipulative Skills (MS) and Conclusion and Evaluation (CE)