Question

Predict the colors that the following aqueous solutions will produce in a flame test:

1. CaF₂(aq)

2. NaOH(aq)

3. CuCO_3(aq)

An explanation for why each aqueous solution is their respective color would aid me in understanding the concept. Thank you so much!

Answer 1

1. CaF2(aq) - Present Metal = Ca2= =Orange to red

2. NaOH(aq) - Present Metal = Na+ = Intense yellow

3. CuCO3(aq) - Present Metal = Cu2+ = Green or Pale green

Explanation:

The flame test is used to determine the identity of a known metal or metal ion based on the element color when the salt turns into a Bunsen burner flame. The heat of the flame excites the electrons of the metal ions, causing them to emit visible light. Everything has a specific indicator that can be used to distinguish between one item and another.
Flame Test Colors
This table lists the expected colors of the elements in the flame test. The names of the colors are matched, so a great way to learn to be aware of familiar color objects is to explore known solutions to know what to expect.

Symbol	Element	Color
As	Arsenic	Blue
B	Boron	Bright green
Ba	Barium	Pale/Yellowish Green
Ca	Calcium	Orange to red
Cs	Cesium	Blue
Cu(I	Copper(I)	Blue
Cu(II)	Copper(II) non-halide	Green
Cu(II)	Copper(II) halide	Blue-green
Fe	Iron	Gold
In	Indium	Blue
K	Potassium	Lilac to red
Li	Lithium	Magenta to carmine
Mg	Magnesium	Bright white
Mn(II)	Manganese(II)	Yellowish green
Mo	Molybdenum	Yellowish green
Na	Sodium	Intense yellow
P	Phosphorus	Pale bluish green
Pb	Lead	Blue
Rb	Rubidium	Red to purple-red
Sb	Antimony	Pale green
Se	Selenium	Azure blue
Sr	Strontium	Crimson
Te	Tellurium	Pale green
Tl	Thallium	Pure green
Zn	Zinc	Bluish-green to whitish green

I hope this helps you to find the clour of other metal also.

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