Last Minute Revision Flashcards
1
Q
Formula for carbonate
A
CO3^2-
2
Q
Formula for nitrate
A
NO3^-
3
Q
Formula of ammonium
A
NH4^+
4
Q
Exothermic reaction
A
Negative energy change causing increase in temperature
Less energy transferred breaking than transferred when new bonds formed
5
Q
Endothermic reaction
A
Positive energy change causing decrease in temperature
More energy transferred breaking bonds than when bonds are formed
6
Q
Litmus
A
Red = acid
Blue = alkali
7
Q
Phenolphthalein
A
Colourless = acid
Pink = alkali
8
Q
Methyl orange
A
Red = acid
Yellow = alkali
9
Q
Anode
A
Positive electrode - ions are oxidised
Oxygen unless halogen is present
10
Q
cathode
A
Negative electrode - ions are reduced into atoms
Hydrogen formed unless metal less reactive is present
