Acids, alkalis and indicators Flashcards
1
Q
Acids are a source of what ions?
A
Hydrogen ions, H+ in a solution
2
Q
Alkalis are a source of what ions?
A
Hydroxide ions, OH- in a solution
3
Q
What happens to the pH of an acidic solution as the concentration of H+ ions increase?
A
It decreases
4
Q
What happens to the pH of an akaline solution as the concentration of OH- ions increase?
A
It increases
5
Q
What is a balanced equation between Zinc and oxygen?
A
Zn + O₂ -> ZnO
6
Q
What is a balanced equation between Magnesium and oxygen?
A
2Mg + O₂ -> Mg₂O
7
Q
What colour is litmus at pH1 and pH14?
A
1 = Red 14 = Blue
8
Q
What colour is methyl orange at pH1 and pH14?
A
1 = Red 14 = Yellow
9
Q
What colour is phenolphtalein at pH1 and pH14?
A
1 = Colourless 14 = Pink
