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Marble Chip Investigation Method 1.Set up the equipment as diagram shows. The measuring cylinder must be filled with water and then inverted into the tub. 2.Measure the quantity of hydrochloric acid and marble chips to the decided amount. Add water to the acid to change the concentration to what you need. 3.Take note of the amount of water in the measuring cylinder. 4.Put the marble chips and hydrochloric acid into the conical flask. Replace the …

…the acid supplied isn't always exactly the strength that it says it is. I would also try to use a more accurate piece of equipment to measure the volume of gas produced, using a measuring cylinder did not provide the best accuracy that was open to me. I could have achieved a higher level of accuracy with a buret. Equation Calcium carbonate + hydrochloric acid Calcium chloride + water + carbon dioxide CaCO3 + 2HCL CaCL2 + H2O + CO2 `