Why is iron added to the head of a match?

In summary, the reason iron is added to the head of a match is because it reacts with carbon to produce pure iron, leaving behind a non-magnetic residue after burning. This is typically done in chemistry labs for educational purposes, as shown in the resource cited. It is not a common practice in commercial match production.
  • #1
ORF
170
18
Hello,

The explanation for this, min 0:54


is that you have Fe2O3 in the match head, and after burning it, pure iron is obtained
2 Fe2O3 + 3 C -> 2 Fe + 3 CO2

I think the chemical explanation is fine, but I don't understand why Fe2O3 is added (as colorant, if the red phosphorus is already red).

Q: Why is iron added to the head of a match?

Thank you for your time.

Regards,
ORF
 
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  • #3
I just tried it with an ordinary wooden match and it wasn't magnetic after burning.
 
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1. Why is iron added to the head of a match?

Iron is added to the head of a match because it helps ignite the matchstick. When the match is struck against the matchbox, the friction creates heat, which causes the iron in the match head to react with the potassium chlorate and sulfur in the matchstick. This reaction produces a small flame that ignites the matchstick.

2. Is iron the only material used in match heads?

No, iron is not the only material used in match heads. Other common materials include antimony sulfide, potassium chlorate, and sulfur. These materials are often added in different ratios to create different types of matches, such as strike-anywhere matches or safety matches.

3. How does the iron in match heads react with the other materials?

The iron in match heads reacts with the potassium chlorate and sulfur through a process called oxidation. This means that the iron combines with oxygen from the air to produce heat and a flame. This reaction is what allows the match to light and ignite the matchstick.

4. Why is it important to have a controlled amount of iron in match heads?

Having a controlled amount of iron in match heads is important because it helps to regulate the temperature of the match flame. Too much iron could produce a flame that is too hot and potentially dangerous, while too little iron may not produce enough heat to ignite the matchstick. The right amount of iron ensures a safe and effective match.

5. Can iron be replaced with a different material in match heads?

Yes, iron can be replaced with other materials in match heads. In fact, different materials have been used in match heads throughout history, such as phosphorus, lead, and mercury. However, iron is a common and effective choice due to its ability to produce a controlled and consistent flame when ignited.

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