PROCEDURE: OXYGEN Remove the glass plate from the wider mouth bottle of oxygen a

Question

PROCEDURE: OXYGEN

Remove the glass plate from the wider mouth bottle of oxygen and quickly add 10 mL of water so that the bottom is barely covered with water.

Replace the glass plate.

Grasp a small wad of steel wool which is iron (about 2 cm in diameter), roll it into a tight ball, hold the steel wool ball with a crucible tong and ignite it on the burner.

When the steel wool begins to glow, about a minute or two, remove the glass plate of the bottle of oxygen and quickly lower the steel wool into the bottle, do not let go of the crucible tong and do not let the steel wood touch the water.

Did the steel wood glow brighter than in the oxygen? What can I expect from this procedure?

Explanation / Answer

Steel wool when heated in an excess of oxygen, forms iron oxide which can burn even when air or oxygen supply is removed (self sustaining property). Thus the steel wool would glow brighter than in the oxygen in the given experiment.

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