YR 12 Metals with water and steam Flashcards
1
Q
Equation
A
Metal+Water=Metal Hydroxide+Hydrogen
2
Q
Potassium
A
-lilac flame
-heat released
-bubbles
-colourless solution produced
-metal disappears completely
3
Q
calcium
A
-bubbles
-heat
-sinks then rises
-colourless with white precipitate
-metal disappears slowly
4
Q
Magnesium
A
-few bubbles
4
Q
Sodium
A
-Orange flame
-bubbles
-heat
-colourless solution
-metal disappears at the end
4
Q
Test for hydrogen
A
Place a splint into the test tube. If there’s a pop then hydrogen is present.
4
Q
Why are sodium and potassium stored under oil
A
To prevent them from reacting with oxygen or moisture in air
