Would flame tests be useful for detecting metal ions present in a mixture of metal ions?

Answer 1

It depends.

Different metals emit different wavelengths of light in a flame test. Some of these wavelengths are visible light, such as Cu, Lit, and K from most metals. Other metals, such as Mg, give off light that is invisible to the human eye. If two or more metals are present and emit multiple visible light colors, it would be difficult to distinguish between them and may even confuse multiple colors for one metal.

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Answer 2

Peyton Adams

Indeed, metal ions present in a mixture can be identified using flame tests. When heated in a flame, each metal ion releases a unique color that can be used to distinguish between different metal ions.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.