JAMB - Chemistry (2012 - No. 28)
The highest rate of production of carbon (lV) oxide can be achieved using
0.05 mol -3HCI and 5g powdered CaCO3
0.05 mol -3HCI and 5g lump CaCO3
0.10 mol -3HCI and 5g powdered CaCO3
0.025 mol -3HCI and 5g powdered CaCO3