science
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Give one precaution that should be taken when using copper sulfate solution or sodium hydroxide?
wear goggles for eye protection wear gloves for skin protection
Describe a test to show that gas is hydrogen
Apply a lighted splint to the gas, there should be squeaky pop sound
Describe a test to show that a gas is carbon dioxide
bubble gass through linewater that the water should turn cloudy
explain how physical changes are different to chemical changes
physical changes are reversible and do not result in the formation of a new subtances.
The process wherein water vapour is cooled to from a liquid is called?
Condensation
During distillation, the condenced liquid that is collected at the end is kown as?
Distilate
Explain how filter paper separates an insoluble solid for a liquid
Liquid goes through the paper however the solid does not pass thorugh
What type of water is potable water?
Tap water
Name the three processess used in purifying water for drinking?
Sedimentation, filtration, chlornation
In a chromatography experiment done with using water as a solvent and paper, which is the mobile and stationary phase?
Pencil is insoluble in the solvent, chromatography would separate the ink in an ink line.
Describe what is meant by convalent bond
A bond formed between a shared pair of electron