Question

objective: to make a compound from a mixture.
materials: iron, sulfur, spatula, bunsen burner, test tube, test tube holder, magnet, paper towel, safety goggles, and lighter.
procedure: perform the following steps

1. place a small amount of iron and sulfur on a piece of watch paper. blend the elements together.
2. run the magnet over the mixture. record what happens if anything to the mixture. be specific.
3. put the mixture in the test tube.
4. light your bunsen burner.
5. place the bottom of the test tube in the flame and point the top of the test tube away from any face. be sure and watch the mixture carefully while heating so that it doesn’t bubble over.
6. when the mixture glows red, continue heating for four additional minutes.
7. turn off the bunsen burner and place the test tube directly on the lab table and allow it to cool.
8. wrap the test tube in a paper towel as if you are wrapping a present and break the test tube.
9. open the paper towel and pass the magnet over the fragments. be careful with the broken glass.
10. throw the glass fragments in the glass collection container and place the paper towel in the garbage.

conclusion: write three to four sentences summarizing what you did during the experiment.
questions:

1. what is a mixture? what type of mixture did you have? (homogeneous or heterogeneous) how did you know?
2. list four physical properties of the iron/sulfur mixture. be specific.

a. _______________________ c. _______________________
b. _______________________ d. _______________________

Explanation:

Question 1

A mixture is a combination of two or more substances where each retains its own properties and they are not chemically bonded. The iron - sulfur mixture is heterogeneous. We know this because the iron and sulfur can be visually distinguished (we can see the separate particles of iron and sulfur) and also, the magnet can attract the iron particles while leaving the sulfur particles, showing that the components are not uniformly distributed.

1. Magnetic property of iron: Iron in the mixture is magnetic. We can observe this when we run a magnet over the mixture, and the iron particles are attracted to the magnet.
2. Color of components: Iron has a metallic gray color, and sulfur has a yellow color. So we can see these distinct colors in the mixture.
3. State (at room temperature): Both iron (in the form of powder or small pieces) and sulfur (powder) are solids at room temperature in the mixture.
4. Texture (appearance): The mixture has a powdery texture (since both iron and sulfur are used in powder form in the experiment setup as per the procedure of mixing on a paper).

Answer:

A mixture is a combination of two or more substances that retain their individual properties and are not chemically combined. The iron - sulfur mixture is a heterogeneous mixture. We know this as the iron and sulfur particles can be visually distinguished, and a magnet can attract iron particles while leaving sulfur particles, indicating non - uniform distribution of components.

Question 2