WHAT IS THIS STUFF?

WHO STOLE THE GOODS?

PROCEDURE / OBJECTIVE

In this lab you will make educated guesses as to what some of the outcomes of mixing unknown chemicals might be. You will be working with many chemicals. As, in all labs you will need to apply your vocabulary words and do good observations in order to be able to have an idea about what is taking place in the lab. Remember your chemistry what - relationship do the chemicals have? What are the beginning observations and how do they compare to your ending observations? Keep in your mind that ending observations give you clues to what chemicals are doing. Keep in mind that nothing happening is also an outcome.

You will be using the following chemicals in this lab:

1) Acetic Acid - CH3CO2H

2) Sodium Carbonate - Na2CO3

3) Phenolphthalein – C2OH14O4

4) Magnesium Sulfate – MgSO4

5) Universal Indicator (unknown)

6) Dihydrogen monoxide H2O

7) Sodium Hydroxide - NaOH

8) Hydrochloric Acid - HCL

9) Indigo Carmine

Follow the lab instructions from the teacher very carefully. It is very important that you follow very good clean procedures during this lab. Groups that do not follow directions will find it impossible to get the proper results for this lab.

ACTIVITY ONE

Make general observations of the liquids before you begin any mixing. Are the chemicals elements or compounds? Do they have any noticeable smell? Do they have any noticeable color? If the chemical is clear how clear is it? Is the chemical a thick or thin liquid?

FOR THIS ACTIVITY SET UP A SIMPLE TABLE TO RECORD YOU OBSERVATIONS FOR BOTH THE PRE AND POST MIXING OBSERVATIONS.

ACTIVITY TWO

Follow the chart below in order as to how to mix the chemicals. Be sure to be ready to record your observations, your group will need to pay careful attention to the events in the lab.

1) Chemical One + Chemical Two = Observe 6) Chemical Seven + Chemical Nine = Observe

2) Chemical One + Chemical Three = Observe 7) Chemical Eight + Chemical Five = Observe

3) Chemical Three + Chemical Two = Observe 8) Chemical Two + Chemical Nine = Observe

4) Chemical Two + Chemical Four = Observe 9) Chemical Seven + Chemical Five = Observe

5) Chemical Five + Chemical Six = Observe 10) Chemical Four + Chemical Five = Observe

FOR THIS ACTIVITY SET UP A SIMPLE TABLE TO RECORD YOU OBSERVATIONS FOR THE POST MIXING OBSERVATIONS.

CLASS QUESTIONS

Be ready to answer the following questions in class.

What chemicals seem to form a solid?

What chemicals seem to cause the other to change colors?

What chemicals seem to replace each other in the reactions?

What are the reactants and the product?