reactions of acids (topic 4) Flashcards
1
Q
(1)
A
a gas is produced
2
Q
(1)
A
potassium carbonate does not decompose to produce a gas
3
Q
A
the reaction has a high activation energy
4
Q
(6)
A
- sulfuric acid in beaker (or similar)
- add copper carbonate one spatula at a time
- until copper carbonate is in excess or until no more effervescence occurs
- filter using filter paper and funnel
- filter excess copper carbonate
- pour solution into evaporating basin
- heat using bunsen burner
- leave to crystallise
- decant solution
- pat dry (using filter paper)
- wear safety spectacles / goggles
5
Q
A
only need to use 159.5 because the copper sulfate is that your trying to find the atom economy for
6
Q
give one reason why is it important for the percentage atom economy of a reaction to be as high as possible
A
less waste produced, waste products may be pollutants
7
Q
(3)
A
- sodium and chloride form an ionic bond
- so the sodium atom loses one electron from its outer shell
- and chlorine atom gains one electron to have a full outer shell
8
Q
A
have no overall electric charge
9
Q
A
an alkali
10
Q
A
indicator
11
Q
A
- pressure
- temperature
- catalyst
12
Q
A
- repeat more times
- calculate a mean
13
Q
A
both students get similar results
