Answer
Pure ZnO has a band gap of ~3.3eV and is therefore colorless. ZnO Powder may have a white appearance due to scattering and a layer of carbonate on the outside of particles as ZnO Reacts with CO2 in the air.
Proper method: Take a strip of zinc and put into the hottest part of a bunsen, then place in acid (I forget which), and burn again to remove impurities. Then dip the zinc into the powdered substance and hold in the flame, noting the colour which tells you what substance it is. Simple version: Mix solution of distilled water and substance, then use a spray gun to spray solution through flame for colours.
An intense white flame is produced when magnesium burns.
NaCl will burn with a brick-red colour in a non-luminous Bunsen flame.
the color of the flame produced when you burn rubidium is tha same color OS what potassium produce-the colour violet
Bright yellow :: This is the sodium ions. Any sodium compound will give a flame test colour of yellow/
You get and orange - yellow colour.
red
blue
It will show it's own spectrograph pattern.
With a shiny blue flame.
Hydrogen burns with a pale blue flame.
To burn off anything present that may alter the colour of your test.
Proper method: Take a strip of zinc and put into the hottest part of a bunsen, then place in acid (I forget which), and burn again to remove impurities. Then dip the zinc into the powdered substance and hold in the flame, noting the colour which tells you what substance it is. Simple version: Mix solution of distilled water and substance, then use a spray gun to spray solution through flame for colours.
An intense white flame is produced when magnesium burns.
In this reaction hydrogen is released and hydrogen burn.
The flame test for strontium - a strong red color.
Ferric chloride burns with a blue/green flame.