Metals Flashcards
What reaction does copper have with water + reaction with dilute sulfuric acid
No reaction on both
State two observations when Magnesium displaces copper (II) sulfate
Solution gets lighter blue
Brown solid is formed
Why is Aluminium good for saucepans
-It has a high melting point
-It’s a good thermal conductor
What is an alloy?
An alloy is a mixture of a metal and another element
Why is the combination of magnesium and aluminium harder than just aluminium
-As magnalium contains magnesium atoms which are bigger than aluminium atoms
-Disrupting the regular lattice structure
-making it harder for the layers to slide over each other
Name the process used to coat iron with zinc
Galvanizing
State the meaning of the term exothermic
Heat energy is released
Aluminum displaces iron from iron (III) oxide to form AlO, why is this a redox reaction
Because aluminum gains oxygen and Iron loses oxygen, oxidation and reduction both occur therefore it’s a redox reaction
Why is a polystyrene cup good to use in a exothermic reaction?
Because polystyrene is a good insulator of heat energy meaning less heat energy will be lost to the surroundings
Rank these 5 metals based on reactivity:
Iron,Tin,Magnesium,Copper,Zinc
Magnesium
Zinc
Iron
Tin
Copper
Describe Gold’s reactivity
Very low reactivity
Zinc reacts with Copper Oxide to form Zinc oxide + Copper
What is the oxidizing agent?
CuO is the oxidizing agent as it loses oxygen and is reduced
Name an uncombined element
Silver - It has a very low reactivity
Why can metals conduct electricity
Because the sea of delocalized electrons are free to move.
Describe the structure and bonding in a metal
Metals have a row of positive ions
metals have a sea of delocalized electrons
Metals have layers that can slide over each other (malleable)
