Form 2 Scientist : Water and Solution

Water and Solution Part 1

Physical Characteristic of Water

• Water is the only substance that can exist in three form: solid (ice), liquid (water) and gas (steam)

• Waters are odorless, colorless and tasteless
• Waters are neutral
• The presence of water can be detected when a blue cobalt chloride paper changes to pink
• The freezing point of water is 0' Celsius
• The boiling point of water is 100' Celsius

Composition of Water

• Water is a compound
• Water is made up of 2 hydrogen atom and 1 oxygen atom
• These atom bound to each other to form a 'V' shape 
• The formula of water is H2O
• Hydrogen and oxygen in the water can be separated through a process known as Electrolysis

• The diagram above shows the process of electrolysis
• Cathode and Anode is a pair of electrodes that are connected to batteries.
• Cathode is connected to negative terminal while Anode is connected to positive terminal of the battery
• Hydrogen gas is released at the cathode end while oxygen gas is released at the anode end
• The volume of hydrogen collected is twice the volume of oxygen gas
• The volume ratio of hydrogen to oxygen is 2:1

Credits to :

 http://www.scorea.net/iTeacher(ScoreA)/