13. Chemical Equations Flashcards
1
Q
Acid + base
A
Salt + water
2
Q
Acid + metal oxide
A
Salt + water
3
Q
Acid + metal carbonate
A
Salt + water + carbon dioxide
4
Q
Acid + metal
A
Salt + hydrogen gas
5
Q
Alcohol + carboxylate acid
A
Ester + water
6
Q
What are signs a chemical change has occurred?
A
Permanent colour change Gas is given off Energy is produced or absorbed A precipitate forms One metal deposits on another Change in mass
7
Q
What is a decomposition reaction?
A
When a substance breaks down into two or more simpler substances
Xy~~~~> x+y
8
Q
What is a combination or synthesis reaction?
A
When a single substance breaks down into two or more simpler substances
X + y—>xy
9
Q
What are precipitation reactions?
A
http://www.gcsescience.com/o48.htm
10
Q
How does the salt form in a neutralisation reaction?
A
The anionic component of the acid and the canonic component of the base.
