Types Of Reaction Flashcards
(21 cards)
Define an oxidation reaction
A substance gains oxygen, oxidation is when oxygen is added to a substance
Acid+a carbonate-
A salt+ water+Carbon dioxide
Acid+metal-
A salt+ hydrogen
Acid+metal oxide (base)-
A salt + water
Name example of salts
Sodium chloride
Potassium chloride
Calcium sulphate
Magnesium nitrate
Define a reduction reaction
A reduction reaction is when a substance loses oxygen
What is combustion
Combustion is a chemical reaction between a fuel and a oxidising agent (normally oxygen)?that is exothermic. The release of heat often produces light in this reaction
What is a thermal decomposition reaction
A substance is broken down chemically using heat to make two or more new substances
Describe what happens to the mass of a compound during thermal decomposition
The mass decreases because gas escapes
Are metal oxides acidic or alkaline
Alkaline
Are nonmetal oxides acidic or alkaline
Acidic
What is the negative electrode called in electrolysis
Cathode
What is the negative ion called
Anion
What is the positive electrode called in electrolysis
Anode
What is a positive ion called
A cation
What is electrolysis
When a high electric current is passed through a substance to separate it.
What is a physical change
A physical change is when no new substance is formed and the change is reversible, often a change in state
What is a chemical change
A chemical change is an irreversible change where a new substance is formed
Is frying an egg a chemical or physical change
Chemical change
What are signs of a chemical change
A change in colour Fizzing or bubbling Temperature change Sound or light produced A solid produced A gain or loss in mass
What are sins of physical change
Often a state change
Colour change
Freezing water
