Reactivity Series Flashcards
What is the reactivity series
It is a list of metals where the most reactive at the top and the least reactive at the bottom
List the reactivity series
Potassium Sodium Lithium Calcium Magnesium Aluminium Zinc Iron Copper Silver Gold
Potassium + oxygen goes to what
Potassium oxide
What is the general equation for metal with oxygen
Metal+oxygen goes to metal oxide
All reaction need some heat to start reacting what is the called
Activation energy
What is the word for when a metal gains oxygen
Oxidised
What does metal oxide + water go to
Metal hydroxide
What is the solubility of
Metal nitrate
Metal sulphate
Metal chloride
All soluble
All except for ca,ba,pb
All soluble except for pb and ag
Where does hydrogen come in the reactivity series
It comes between lead and copper
Why is hydrogen not on the reactivity series
Because hydrogen is not a metal
What is the general word equation for a metal (above hydrogen) reacts with acid
Metal + acid goes to metal salt + hydrogen
Balance this equation (think of the groups on the periodic table)
Sodium + oxygen goes to sodium oxide
Na+O2 goes to Na2O
4Na+O2 goes to 2Na2O
What type of reaction is this
Iron+copper(2)nitrate goes to iron(2)nitrate + copper
It is a displacement reactions where a less reactive metal compound and a more reactive metal react and the more reactive metal turns into a metal compound and the less reactive metal is no longer a compound
Rusting is the name given to what metal corroding
Iron
Oxygen and what are both required for iron to rust
Water
Write a word equation for rust
Then balance it
Iron + oxygen +water goes to hydrated iron(3)oxide
2Fe + 1 1/2 O2 +xH2O goes to Fe2O3XH2O
How do you stop rusting
Alloying Sacrificial protection Galvanising Painting Plastic coating Oil and grease Tinning Electroplating
What is galvanising
Name 2 advantages
Name 2 disadvantages
Is means it is dipped in molten zinc so the zinc corroded instead of the iron
Long lasting
Iron can be exposed to air and water without rusting
Expensive
Appearance is dull
What is alloying
Name 2 advantages
Name 2 disadvantages
Mixes molten iron with chromium oxide to make stainless steel
Last for life time of steel
Gives good shiny finish
Expensive
Chromium is rare
