Disappearing x experimentintroductioni am going to investigate the rate of reaction between sodium thiosulphate (thio) and hydrochloric acid method first of all we measured out 25cm3 acid and 25cm3 sodium thiosulphate then we drew a cross onto a piece of paper and put an empty conical flask on top of the paper. Chemistry plan i am going to produce a piece of coursework investigating the rate of reaction, selecting a variable to see how this affects the rate the rate of reaction is the rate of loss of a reactant or the rate of formation of a product the rate is measured by dividing one by the time the reaction took to take place there are. Vary the concentrations of reactants and measure the time it takes for product to appear this video is part of the flinn scientific best practices for teach. Introduction: the rate at which an object cools (ie how quickly its temperature decreases) depends upon several factors, including: surface area volume type of insulation temperature difference with the surroundings for this investigation, the effect of the temperature of water upon the rate of cooling will be. Rates of reaction coursework introduction in this piece of science coursework i will be experimenting how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by the concentration of sodium thiosulphate i will measure the rate of reaction by mixing the different quantities of sodium. Controlled assessment task (cat) – reaction rates guidance notes for teachers candidates should be given an opportunity to investigate a factor that affects the reaction rates of an acid candidates should identify the independent variable as either concentration of acid or temperature one possible method might be.
An experiment suitable for gcse science investigating the effect of concentration and temperature on the rate of reaction. Gcse-sciencecom gcse twenty first century science candidate style answers specimen gcse twenty first century science additional science a a154 chemistry a a174 practical investigation factors that affect the rate of reaction of calcium carbonate with. A secondary school revision resource for aqa gcse additional science about chemical reactions, energy changes, rates of reaction and reversible reactions. Magnesium reacts with dilute hydrochloric acid in a conical flask which is connected to an inverted measuring cylinder in a trough of water the volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph.
In this piece of coursework, i will study how concentration affects the rate of reaction i will do so by timing the reaction of sodium thiosulphate with an acid in this coursework, i will include background knowledge, prediction, safety, results, calculations, graphs, an analysis, conclusion and an evaluation in my evaluation i. We will be investigating the rates of reaction when we will mix together sodium thiosulphate and hydrochloric acid i will carry out trial runs to decide which of the four factors that affect rates of reaction i will measure in my final run i could do different experiments the experiments i could do are: • measuring volume of gas. Anjelina qureshi mrs gravell rates of reaction coursework chemistry year 11 rates of reaction introduction a chemical reaction occurs when things change from reactants into products these reactions only happen if the reacting molecules collide properly the rate of reaction is the speed of a reaction when the solution.
Reaction kinetics is the study of the rate of chemical reactions, and reaction rates can vary greatly over a large range of time scales some reactions can proceed at explosively fast rates like the detonation of fireworks (figure 171 “fireworks at night over river”), while others can occur at a sluggish rate over many years like. How science works variables - independent - dependent the variable which is chosen for an investigation by the person doing the experiments is called the independent variable the thing being affected is called the dependent variable for example, the rate of the reaction between hydrochloric acid and calcium. Investigating how changing variables in an experiment affects the rate of reaction the title of my investigation is fizzy chips i will be investigating how changing variables in an experiment effects the rate of reaction i will do this by observing a reaction between marble chips and hydrochloric acid there are many.