chemical tests 4.6 Flashcards
1
Q
test for hydrogen
A
squeaky pop
2
Q
test for oxygen
A
relights a glowing splint
3
Q
test for water
A
anhydrous copper sulfate changes from white to blue
4
Q
test for pure water
A
bp is 100 degrees
5
Q
test for carbon dioxide
A
bubble through lime water, clear to cloudy
6
Q
test for chlorine
A
damp blue litmus, blue to white
7
Q
test for ammonia
A
red litmus, red to blue
8
Q
what are cations
A
positive ions
9
Q
how to conduct a flame test
A
dip a piece of platinum wire into hydrochloric acid
dip the wire into a sample of solid or solution
place the tip of the wire into Bunsen flame
10
Q
red flame
A
lithium Li+
11
Q
yellow flame
A
sodium Na+
12
Q
lilac flame
A
potassium K+
13
Q
orange/red flame
A
calcium Ca2+
14
Q
blue/green flame
A
copper Cu2+
15
Q
what is sodium hydroxide used to test for
A
Cu2+, Fe2+, Fe3+
