Surface area core practical (rate of reaction)

• Calcium carbonate + hydrochloride-> Calcium chloride + water + carbon dioxide
• Conclusion -we found out that small chips reacted faster than large chips because there's is more collisions than larger surface area
• Dependent variable(measure) is volume of gas produced
• Independent variable(change) is chips surface area
• Control variable(same) is mass of chips and volume of hydrochloric acid
• Method

  Step 1: Measure 50 cm3 of the 1.0 mol/dm3 hydrochloric acid into the conical flask and connect the bung and delivery tube. Step 2: Set up the gas syringe or upside-down measuring cylinder.
• Step 3: Connect the delivery tube to the gas syringe or place it under the measuring cylinder. Step 4: Weigh 5 grams of the larger marble chips using the top pan balance.
• Step 5: Add the marble chips to the conical flask and quickly replace the bung. Step 6: Start the stop watch and every 10 seconds record the volume of gas collected in the gas syringe or measuring cylinder.
• Step 7: Remove the bung after 100 seconds. The gas syringe can fill quickly with carbon dioxide so make sure the bung is removed before it is completely full as it may fall and smash. Step 8: Repeat steps 1 to 7 with either a different concentration of hydrochloric acid or different sized marble chips.
• Different sizes of marble chips. 1.0 mol/dm3 and 1.5 mol/dm3 hydrochloric acid. Dilute hydrochloric acid is an irritant so safety goggles should be worn to protect your eyes. A conical flask, bung and delivery tube. A gas syringe or a measuring cylinder and water trough to measure the carbon dioxide collected. A top pan balance to weigh the marble chips. A stopwatch to measure the time intervals. Eye protection, for safety