Testing for products

Question 1

co2

Answer 1

Bubble the gas through lime water.
It turns milky
Ca(OH)2 + CO2 CaCO3 + H2O

Question 2

o2

Answer 2

Put a glowing splint near a gas.
If the splint re-lights the gas is oxygen.
Oxygen is the only gas that supports combustion.

Question 3

h2

Answer 3

Put a lit splint near the gas.
If it is hydrogen it will burn with a squeaky pop sound.
Hydrogen will be reacting with oxygen-producing water.
Powerful exothermic reaction used to launch rockets into space.
Some sickos make bombs out of this.
Hydrogen fuel cells are revolutionizing how we produce electricity.

Question 4

Acid – Base/Alkaline Test

Answer 4

We can use indicators
There are different types, from red cabbage, to universal Indicator. You will learn a lot more in yr 12.
pH meters