How Concentration Of Acid Affects The Rate Of Reaction With Magnesium Ribbon

1171 words - 5 pages

PlanningIn this experiment I am going to find out how concentration of acid affects the rate of reaction with magnesium ribbon.Equation for this reaction:Mg + 2HCl --> MgCl2 + H2PredictionIn this experiment I think the higher the concentration of hydrochloric acid the faster the reaction.Scientific knowledgeThe highest concentration reacts faster as the solution is more concentrated which means that there will be more particles in the solution which means that there will be more collisions and therefore more successful collisions and therefore the rate of reaction will increase. If the concentration is doubled, the number of particles in any space will be doubled, so there will be double the number of collisions, and so double the number of successful collisions and therefore the rate of reaction will be doubled.In this experiment I'm going to use 5cm3 of magnesium ribbon. Also I'm going to use 50cm3 of solution (acid and water)Fair testTo make this experiment a fair test I must ensure a few things:* The only variable in this test is the concentration* Measuring the substances accurately, and using the same equipment to do so.* Not changing the volumes of the chemicals* making sure I clean the flask everytime after each test* size of magnesium ribbon must be the sameIf I keep these things the same, my experiment should be accurate, but if these things are varied my results will be affected.SafetyTo keep my experiment safe I will follow the following rules.* Remove everything in my way* And stand up when doing the experiment* Wear goggles when dealing with the chemicals so they don't go near your eyes.Apparatus* Safety glasses* Gas syringe* Side arm conical flask* Bung* Stopwatch* Measuring cylinder* Beaker* Thermometer* Hydrochloric acid* Paper towels* Clamp standMethod1. First collect all the apparatus (Gas syringe, clamp stand, goggles, 2 measuring cylinder and conical flask2. Then set up the apparatus by attaching the clamp to the gas syringe and then connect the gas syringe to the conical flask3. Then measure out 50cm3 of acid into a measuring cylinder and then pour it carefully into the conical flask (avoiding the side with the rubber tubing) and water when needed.4. Then measure and cut 5 cm of Magnesium ribbon.5. Take a temperature reading of the acid and then take a reading of the room temperature using a thermometer and then record it in a table.6. Add the 5cm of Magnesium ribbon into the conical flask full of acid and then quickly replace the bung on the conical flask and quickly start the timer.7. Then take readings every 5 seconds and record the volume of gas measured in the gas syringe in a table until there are 5 readings the same.8. Repeat the experiment 2 more times for this concentration and then from step 3 onwards for 3 different acid concentrations.Concentration of acid and water cm3 50 cm3Acid0 cm3 water 40 cm3 Acid10 cm3 water 30 cm3Acid20 cm3water 20 cm3Acid30 cm3waterRoom temp 28 23 23 23 23 24 24 24 24 24 22 23Acid...

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