acid + base reaction Flashcards
1
Q
bases react with what to form salt and water?
A
metals
2
Q
what observation occurs in an acid+ base reaction?
A
the base disappears because it’s used up in the reaction
3
Q
what happens if the salt is soluble?
A
it dissolves in the water to form a salt solution
4
Q
how to make salt crystals? (1st step)
A
- add excess base to hot acid- this makes the salt solution quickly and ensures all the acid is used up
5
Q
how to make salt crystals? (second step)
A
-filter out the excess base
-the salt solution is the filtrate and is collected in an evaporating basin
6
Q
how to make salt crystals? (3rd step)
A
-heat the salt solution until crystals start to form around the edges
- this saturates the solution so that crystals form more effectively
7
Q
how to make salt crystals? (4th step)?
A
-leave the salt solution to crystallise
-the collection of water allows crystals to form
