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Iron-Sulfur Combination

1) What kind of substance is iron-sulfur combination before heating?

2) Why is it necessary to heat the test tube in order for a chemical reaction to occur?

3) What kind of substance is iron-sulfur combination after heating?

4) The element sodium reacts explosively with water and the element chlorine is a yellow-green poisonous gas. When chemically combined, sodium and chlorine form nonexplosive, nonpoisonous table salt. How can this be? What is happening?

5) Is Iron Pyrite a mixture or compound? What about Salt Water? What about Silicon Dioxide? What about Sand?

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1) What kind of substance is iron-sulfur combination before heating?

If you put iron and sulfur in a test tube, then all you've got in your test tube is iron and sulfur. No surprise there. Before heating, there is no chemical reaction. Therefore, you've got what's called a "mixture." In other words, you can easily separate the iron from the sulfur through a number of various physical separation techniques. For example, you can use a simple magnet to separate the iron from the sulfur at this point.

2) Why is it necessary to heat the test tube in order for a chemical reaction to occur?

The heat is necessary to provide the necessary activation energy (Eact) in order to get the reactants to combine successfully to produce the chemical reaction. Remember, all reactions (whether they are exothermic or endothermic) still require a certain amount of energy in order to get them "over the hump" to reach ...

Solution Summary

What kind of substance is iron-sulfur combination before heating?

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