Writing Chemical Equations Flashcards
1
Q
Reactant
A
Chemicals at the start of the reaction
2
Q
Product
A
Chemicals made at the end of the reaction
3
Q
Chemical reactions
A
A new substance is formed. Difficult to reverse the reaction
4
Q
Physical reactions
A
Usually a change of state or mixture. Relatively easy to reverse reaction/ separate mixture
5
Q
Evidence of chemical reactions
A
- Chage of colour
- Chande of odour
- Light and/ or heat given off
- Formation of gasses often appearing as bubbles or fizzing in liquids
- Formation of precipitate( insoluble particles)
- Change is difficult or impossible to reverse
6
Q
Conversation of mass
A
The mass of the product is the same as the mass of the reactant ( no particles are gained or lost)
