The difference between graphite powder and iron powder

2021-08-11

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Graphite powder belongs to the hexagonal crystal system and has a layered structure. It is widely used in industrial applications. Graphite powder and iron powder look remarkably similar, making them sometimes difficult to distinguish. Below, we’ll introduce two methods for differentiating between the two:

I. Chemistry

1. Mixed heating

When copper oxide is mixed with graphite powder and then heated, CO2 will be produced, causing the clear lime water to become cloudy. However, this phenomenon does not occur with iron powder.

2. When dilute sulfuric acid or dilute hydrochloric acid is added to iron powder, bubbles will appear.

II. Physics

1. Heating

Graphite powder ignites in air, but iron powder turns black.

2. Magnet

Iron powder can be attracted by a magnet, but graphite powder cannot be attracted by a magnet.

3. Touch

Graphite powder feels oily, whereas iron powder does not.

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