Mass Loss Method

Hydrochloric acid and calcium carbonate react in beaker

Glass wool prevents splashing

Gas is free to escape the reaction vessel

As the reaction proceeds and carbon dioxide escapes, the mass displaced by the mass balance decreases

Measure mass lost at various times

Plot Time vs mass lost

Mass balance displays mass of beaker, hydrochloric acid, glass wool and calcium carbonate

Initial total mass - Mass at a given time = Mass of carbon dioxide evolved at that time