04. Spot the hazard
In this experiment you will be comparing three different acids. You will find out which is the most hazardous by looking at how well they react.
Apparatus
test tube rack
test tubes
acids X, Y & Z
magnesium ribbon
marble chips
thermometer
Method
A Fill a test tube about one third full of acid X.
B Put one of the pieces of magnesium into the tube.
C Watch what happens. Write your observations in the table.
D When the fizzing stops, measure the temperature of the liquid.
E Put acid Y into a second tube.
F Put another piece of magnesium into this tube.
G Now put acid Z into a third tube.
H Do the experiment again using acid Z. Record your results.
I When the tests are finished, pour all the liquids away.
J Refill the three tubes with fresh acids X, Y and Z.
K Do the tests again, using marble chips instead of pieces of magnesium.
Recording your results
Considering your results
I think the most hazardous acid was...
The least hazardous acid was...
I thought this because...