Flashcards in Chemistry 3 Deck (14):
What are the properties of Alkali/Group 1?
1 electron in outer shell
Soft and cut with knife
Melting point decreases down group 1
What happens when Group 1 react with water?
Sodium+Water--> Hydrogen+ Sodium Hydroxide
What happens when alkali metals react with chlorine?
A salet is produced
Sodium+Chlorine--> Sodium Chloride
What are the properties of transition metals?
Good heat conductors
Good electrical conductors
Strong and Hard
High Melting point
What are the properties of Halogens/Group 7?
Boiling and Melting points increase down the group
What is a displacement reaction?
The more reactive Halogen will displace the less reactive halogens.
What are the colours of the Halogen compounds?
What is Hard Water?
Hard water has ions of Magnesium and Chlorine
What is permenant hard water?
Ca+ ions are from Sulphate (SO4-2)
What is temporary hard water?
Ca+ ions are from Hydrgoencarbonates
How can water be softened?
Adding Sodium Carbonate Na2CO3 reacts with the ions.
What is the ion exchange collumn?
Swaps sodium ions for calcium and magnesium ions.
Used in heating
What happens when you boil hard water?
The hydrogencarbonate decomposes to form calcium carbonate.