chemistry Flashcards
Metal + oxygen
= Metal oxide
Metal + water
metal oxide + hydrogen
Metal + acid
Metal + acid → salt + hydrogen
Name the salts produced from reacting a metal with
b) sulfuric acid
sodium sulfate
Name the salts produced from reacting a metal with
(a) hydrochloric acid
Sodium chloride
Name the salts produced from reacting a metal with
c) nitric acid
Copper(II) nitrate
Name 2 metals stored under oil.
lithium, sodium and potassium
Name 2 metals that react with acid but not with water.
Gold and silver
Describe the test for hydrogen gas
Place a lighted splint in a test tube containing the gas. If the gas is hydrogen, there will be a squeaky pop
What is a metal ‘ore’?
naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them
Name 2 metal oxides that decompose on heating to produce the metal.
Mercury(II) oxide and Magnesium (II) oxide
Name 2 oxides that are extracted by heating with carbon
zinc, iron, tin, lead and copper
Name 2 metals that are extracted by electrolysis.
Calcium
Magnesium
Name the metal extracted in a Blast Furnace
iron ore
State the definition for corrosion.
Corrosion is a natural process that converts a refined metal into a more chemically stable oxide
State the difference between rust and corrosion
Corrosion is the process by which certain materials, metals and non-metals, deteriorate as a result of oxidation. Rusting is oxidation of iron in the presence of air and moisture
What are the 2 conditions required for rusting?
water and oxygen
Describe the test for rust
Rust functions that verify that the non-test code is functioning in the expected manner
What is meant by sacrificial protection?
The protection of iron or steel against corrosion by using a more reactive metal.
Name two metals that could be used to protect iron from rusting by providing sacrificial protection.
steel and with a layer of zinc
