Note: metals above hydrogen in the reactivity series will not react with acids.
Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.
Method
1. Put 5cm3 of dilute HCl in three different
2. add the metal samples to the HCl
3. Note the rate of
Control variables
same concentration
volume of hydrochloric acid
same mass of metal (we will look into this further in Year 10)
same particle size of metal
same temperature of acid
Results
no bubbles for
magnesium bubbles than iron
Reactivity series from least to most reactive is
Least reactive Most reactive
Note two compounds would neutralise the acid but the question ask for the best!
From 0-26 cm3 the pH decreases
at 26 cm3 the pH decreases
From 26 - 50 cm3 the pH decreases
Select the cells where there should be a tick



Barium hydroxide + hydrochloric acid -->
use a splint
Positive result =