How changing the concentration changes the rate of reaction. :: GCSE Chemistry Coursework Investigation

How changing the concentration changes the rate of reaction.IntroductionWe are deviation to escort at the following factors during thisinvestigation1 Why altering rate could be an advantage2 Good ideas to control the rate of reactions3 curtly mention the factors that can change the rate of reaction such as -TemperatureSurface AreaCatalystConcentrationI am going to mention out if changing the concentration of nitric acid inwater and see if it has any effect on changing the rate of which settle is form when reacts with sodium thiosulphate.PredictionI think that a faster reaction leave behinding happen with a higher acidconcentration as in that respect will be more successful collisions with sodiumthiosulphate, which will result in a faster reaction because theproduct will be produced quicker. frame-up1 Conical Flask2 Beakers3 Measuring CylindersPaper with a black cross on StopwatchNitric bittersodium ThiosulphateWater Safety GlassesMethodFor my experiment I will measure out 2 5cm of Sodium Thiosulphate andput it in a conical flask. I will put the flask on top of a piece ofpaper that has a black cross drawn on it. I will then measure 15cm ofNitric Acid and add this to the Sodium Thiosulphate in the conicalflask. The two should react together to make a cloudy precipitate andwe are going to time how long it takes for the liquid to turn cloudyuntil we cant see the cross underneath the glass anymore. We aregoing to carry this experiment out a number of times but each time wewill decrease the volume of Nitric Acid by 1cm and add 1cm of water.Each time we will decrease the Nitric Acid and increase the volume ofwater to see which one holds the fastest reaction. Our final measuring ofNitric Acid should be 5cm and 10cm of water. I will repeat theexperiment 3 times to make sure that my results are as accurate asthey can be. I will then record my results onto a graph so I cancompare them better and make a crinkle of best-fit graph to show myresults even clearly.Ho w will I make it a fair test?To make sure that my experiment is fair I will always use the similaramount of Sodium Thiosulphate and the only factor I will change willbe the volume of Nitric Acid and water but only to total 15cm so thedepth of the liquid will always be the same. Also, I will always usethe same conical flask and wash it out after every time I have usedit.EvaluationFirst of all we put our arctic goggles on, and then we added 25cm3 of