Chemical Reactions Flashcards
1
Q
State five signs of a chemical reaction is occurring
A
Effervescing, precipitative, change of colour, increasing temperature and explosions
2
Q
Define product
A
Products are the substances made and the reaction
5
Q
What is this as a symbol equation?
Magnesium+Hydrochloric Acid -> Magnesium Chloride+Hydrogen
A
Mg+2HCl->MgCl2+H2
6
Q
What is thermal decomposition
A
When something is broken down through heat
7
Q
Define reactants
A
Reactants are the starting substances
8
Q
What is the chemical reaction
A
A chemical reaction is when atoms are rearranged to form a new substance
11
Q
What is the difference between a chemical and physical reaction
A
Physical reactions are reversible and chemical reactions are not easily reversible
