Chemical Reactions Flashcards
(19 cards)
What divides metals and non-metals in the periodic table?
The ‘staircase’
What are the properties of copper that make it suitable for electrical wires?
Flexible and a good conductor of electricity
What is an alloy?
A mixture of two or more elements, where one is a metal
What is steel an alloy of?
Iron and carbon
Why are alloys usually harder than pure metals?
Different sized atoms disrupt the regular structure
What is the general reaction formula for an acid reacting with a base?
Acid + base → salt + water
What is produced when an acid reacts with a metal?
Salt + hydrogen
What is the result of an acid reacting with a metal carbonate?
Salt + water + carbon dioxide
What determines the name of the salt produced in an acid reaction?
The metal and the acid involved
What is the salt name produced from hydrochloric acid?
Chloride
What do metals that react with cold water produce?
Metal hydroxide and hydrogen gas
What is the test for hydrogen gas?
It burns with a ‘squeaky pop’
What is a displacement reaction?
When a more reactive metal displaces a less reactive metal in a compound
What is the general formula for complete combustion?
Fuel + oxygen → carbon dioxide + water vapour
What is the difference between complete and incomplete combustion?
Complete combustion has plenty of oxygen; incomplete has limited oxygen
What type of reaction releases energy to the surroundings?
Exothermic reactions
What are some examples of exothermic reactions?
- Combustion reactions
- Neutralisation reactions
- Hand warmers
What type of reaction absorbs energy from the surroundings?
Endothermic reactions
What are some examples of endothermic reactions?
- Injury sports packs
- Bath bombs
- Sherbet fizz sweets
