Studied by 1 person
What ion and flame test colour would you get for lithium?
Ion = Li(+)
Flame test colour = red
What ion and flame test colour would you get for sodium?
Ion = Na(+)
Flame test colour = yellow
What ion and flame test colour would you get for potassium?
Ion = K(+)
Flame test colour = lilac
What ion and flame test colour would you get for calcium?
Ion = Ca (2+)
Flame test colour = orange-red
What ion and flame test colour would you get for copper?
Ion = Cu(2+)
Flame test colour = green-blue
What is the method for doing a flame test? (3 steps)
Dip the clean nichrome loop into the test powder or solution
Use the handle to hold the loop in the edge of a roaring blue flame
Record the flame colour
What is the formula of the ion and colour of hydroxide precipitate of iron (II)
formula of ion = Fe(2+)
colour of hydroxide precipitate = green
What is the formula of the ion and colour of hydroxide precipitate of iron (III)
formula of ion = Fe(3+)
colour of hydroxide precipitate = orange-brown
What is the formula of the ion and colour of hydroxide precipitate of copper (II)
formula of ion = Cu(2+)
colour of hydroxide precipitate = blue
What is the formula of the ion and colour of hydroxide precipitate of calcium
formula of ion = Ca(2+)
colour of hydroxide precipitate = white
What is the formula of the ion and colour of hydroxide precipitate of zinc
formula of ion = Zn(2+)
colour of hydroxide precipitate = white
Since calcium hydroxide and zinc hydroxide are both white, how can u distinguish them?
If you add an excess of sodium hydroxide solution, zinc hydroxide dissolves to form a colourless solution but calcium hydroxide does not dissolve
