An experiment to find out how changing the concentration of acid :: GCSE Chemistry Coursework Investigation

An experiment to find emerge how changing the concentration of acidaffects the esteem of reactionPlanningAimI am to find forth how changing the concentration of the hydrochloricacid (HCL) affects the rate of reaction. The hydrochloric acid ordain bereacting with marble chips (small, medium, large).During my experiment I testament be changing one variable. This will be theconcentration of the acid. I will use the concentration of HCL from0.5 molar/dm3 to 3.0 molar/dm3. I will use 3grams of marble chips forevery size of chip. By doing this I will find out if the rate ofreaction is quicker or slower using a different concentration of acid.The equation I will be using isCaCO3 (s) + 2HCl (aq) CaCl2 (aq) + H20 (l) + CO2 (g)Calcium Hydrochloric Calcium Water CarbonCarbonate Acid Chloride DioxideMethodFirstly I must let the correct equipment and assemble it dependablely andcorrectly. To do this I will fill a water tray half full with water.Then I will perk 3g medium chips. I will me asure 30cm3 ofhydrochloric acid. I will connect the delivery tube to the measuringcylinder which is turned over which will be full with water. This isshown on my diagram. I will begin timing using a stopwatch and recordthe results every 10 seconds for 1 minute. I will use 0.5molar/dm3 to3.0molar/dm3 of hydrochloric acid and record 3 sets of results andthen I will take an average.Fair TestIn order to make my experiment safe I will change only one thing. Iwill be changing the concentration of the acid. Everything else willremain the same through out the experiment. I will use the sameequipment and do the experiment during the same lesson where I can.This can be important because room temperature can increase the rateof reaction. The temperature could be higher on a certain day andaffect my results.Background InformationRates of Reaction* Increasing the temperature increases the rate of a chemical substance reaction.* Some chemical reactions are fast and others are slow. A fast react ion could be a rocket exploding, and a slow reaction is metal rusting.* Rates of reaction can be measured by finding out how quickly a product is formed or how quickly a reactant is used up.* Examples of measuring reaction rates include measurement of the volume of gas formed, and measurement of the loss in mass when a gas is prone off.How does surface area affect a chemical reaction? If one of the reactants is a solid, the surface area of the solid will