Question

Metal: barium, calcium, copper, lead, potassium

Flame Color: light green, brick red, blue/green, blue/white, lilac


You are presented with four chemical compounds. Each compound contains a different metal. When the compound is heated in a flame a distinct color is emitted as the electrons are excited and give off different wavelengths of light. Determine the unknown compound based on the data table and photo.


A barium chloride
B calcium chloride
C copper (II) sulphate
D potassium nitrate

Answers

GPT-4o mini
To determine the unknown compound based on the provided metals and their corresponding flame colors, we can match each compound with the flame color it emits when heated.

1. **Barium chloride** produces a light green flame.
2. **Calcium chloride** produces a brick red flame.
3. **Copper (II) sulfate** produces a blue/green flame.
4. **Potassium nitrate** produces a lilac flame.

Now, based on this information, we can use the flame colors to identify each compound:

- If the emitted flame color is **light green**, the compound is **barium chloride (A)**.
- If the flame color is **brick red**, the compound is **calcium chloride (B)**.
- If the flame color is **blue/green**, the compound is **copper (II) sulfate (C)**.
- If the flame color is **lilac**, the compound is **potassium nitrate (D)**.

With this information, you can match the unknown flame color observed in the photo to the corresponding compound listed above. If you specify the actual flame color observed, I can help you identify the unknown compound.

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