Chemistry Flashcards
What affects corrosion?
Moisture
Pollutants
Surface area
Purity of metal
Temperature
What is the equation of the reaction of metals with acids.
Metal+acid —> metal salt+hydrogen
Place metals in order of reactivity
Potassium
Sodium
Calcium
Magnesium
Aluminium
Zinc
Iron
Lead
Copper
Silver
Gold
State the tests for:
Hydrogen - Carbon Dioxide - Oxygen
Hydrogen: Pop Test
Carbon dioxide: limewater
Oxygen: a glowing splint will burst into flame in a test tube with oxygen gas
What is the difference between physical changes and chemical changes?
Chemical change: when a reaction forms new products
Physical change: when state of matter changes
How do you identify the products and reactions in an equation?
The reactants: left
Products: right
What is the equation for the reaction or non-metals?
Non-metal+water —> acid(e.g hydrogen)
How can metals be protected from corrosion?
Painting
Oiling & greasing
Coating with plastic
What is a catalyst and what are they used for?
A catalyst is a substance that accelerates a chemical reaction. You use a catalyst when you want a faster, more energy-efficient reaction
Name some common uses of metals
Construction
Transportation
Electronics
Medicine
What are the properties of Halogens?
Low melting & boiling point
7 electrons in outer shell
Soluble in water
What are the properties of Noble Gases?
Non reactive
Colourless
What are the properties of Metals?
