Rates Of Reaction: Sodium Thiosulphate + Hydrochloric Acid

1492 words - 6 pages

Rates of reaction:- sodium thiosulphate + hydrochloric acid


We must produce a piece of coursework investigating the rates of
reaction, and the effect that changing one particular variable has on
the reaction time. The rate of reaction is the time it takes one or
more of the reactants to react or the time it takes to produce a new
product from a chemical reaction. To work out the reaction time we use
the formula.

1 divided by time taken for reaction

There are five factors which affect the rate of a reaction, according
to the collision theory of reacting particles:

1. temperature of solution,
2. concentration of solution,
3. pressure of gases in reaction,
4. ...view middle of the document...

Na2S2O3 (aq) + 2HCl (aq) .

As I decided after my preliminary experiments I will only carry out
one experiment, temperature change whilst all other variables stay
constant. As both, sodium thiosulphate and hydrochloric acid are
soluble in water it means that I would be able to alter the
concentration of either of them. However I have chosen to vary the
sodium thiosulphate as it is available in larger amounts. To alter the
temperature of the solution a water bath will be used to heat up the
acid, thiosulphate and water to the necessary temperature.

I decided on my range temperatures and the concentration that I would
use during my preliminary series of experiments -

I would be using a concentration of 0.25 mole:-5cm³ hydrochloric acid

5cm³ water

10cm³ sodium thiosulphate

I will also be using a range of 5 temperatures:- 30ºC, 40ºC, 50ºC,
60ºC and 70ºC

I have chosen to use these ranges of temperatures and concentration
because a weaker concentration took to long and a stronger
concentration was to fast. I have chosen the range of temperatures
because they give the best range of results.

Using my preliminary experiments I decided on using the following

2 thermometer
1 beaker
2measuring cylinders
1 conical flask
1 stop clock
1 water bath
1 piece of card with cross in center
1 pair of goggles


First I will measure out 5cm³ of hydrochloric acid into a measuring
cylinder. I will then place it in to a pre-heated water bath and place
a thermometer into the acid. I will then measure out 10cm³ of
thiosulphate and 5cm³ of water into a measuring cylinder. I will then
place a thermometer into the diluted thiosulphate and place it in to
water bath. While the acid and thiosulphate solution are heating up I
will place a conical flask on to a piece of a card which has a large
black cross drawn on its center. Once the acid and thiosulphate have
reached the temperature of the water bath that they're in, room
temperature -70ºC. I will pour them into the conical flask and start
the stop clock. I will look at the solution and when it turns to
cloudy to see the cross at the bottom of the conical flask I will stop
the stop clock. I will repeat this process three times for each of my
six temperatures.

Repeat results and averages will be taken to improve the credibility
of the findings, and present solid grounding for the final conclusion.
The repeat results will help to iron out any anomalies and the average
will give a good summary of the results of the experiment. However if
one set of results is entirely different to the other, a third
experiment will be performed to replace the anomalous set of results.

Safety :-

A pair of goggles will be worn during the heating part of the
experiment in order to protect the eyes. I would ideally like to wear
an apron to protect the skin and clothing but none are available for
use so I will just have to careful when heating and...

Other Essays Like Rates of reaction:- sodium thiosulphate + hydrochloric acid

GCSE Science Coursework - Investigating the factors that affect the reaction between sodiumthiosulphate and hydrochloric acid

415 words - 2 pages Investigating the factors that affect the reaction between sodiumthiosulphate and hydrochloric acidAim:To investigate the differences in rate of reaction between sodiumthiosulphate and hydrochloric acid as the concentration of sodiumthiosulphate is either raised or lowered while keeping the total volume of the sodiumthiosulphate solution at 50cm .The chemical reaction for this experiment is:Method:I start with 5cm of hydrochloric acid to which I

Experiment on Rates of Reaction Essay

780 words - 4 pages concentration of acid, the quicker the reaction is going to take place. Main Experiment: Aim: Our aim of this experiment was to investigate the effect of concentration on rates of reaction using different concentrations of sodium thiosulphate and hydrochloric acids. Prediction: I thought that the higher the concentration that we used, the test was going to be a lot quicker but the lower the concentration, the test

Chemistry Rates of Reaction Coursework

5365 words - 22 pages Meter 10 Gas Collection 10 Strand Eb 11 Data Analysis 11 Graph Evaluation 11 Strand Ra 12 Secondary Data 1 12 Secondary Data 2 13 Secondary Data 3 14 Strand Rb 15 Conclusion 15 Bibliography 16 Strand Sa The Science In the experiment, I will be testing how increasing the concentration of the reactant affects the rate of reaction between hydrochloric acid and sodium thiosulfate .Due to Max Trautz’s collision theory, which

Acid-Base Titration: Determination of the Percentages (%) of Sodium Carbonate (Na2Co3) and Sodium Hydroxide (Naoh) in a Mixture

1061 words - 5 pages Title Acid-base titration: Determination of the percentages (%) of sodium carbonate (Na2CO3) and sodium hydroxide (NaOH) in a mixture Objective To determine the respective weight per cent of sodium carbonate and sodium hydroxide in a mixture by acid-base titration. Result and calculation Part A Titration 1 Titration number 1 2 3 Initial volume of burette( cm3) 5.10 2.70 9.70 Final volume of burette (cm3) 34.40

An Experiment To Investigate The Effect Of Changing The Concentration

1153 words - 5 pages An experiment to investigate the effect of changing the concentration of hydrochloric acid on the rate of reaction with sodium thiosulpahte. Aim I am trying to find out how the concentration of hydrochloric acid affects the reaction time with sodium thiosulpahte. If a clear solution of sodium thiosulphate is mixed with hydrochloric acid then a reaction will occur where a creamy-yellow precipitate of sulphur is produced. H20

Investigating Some Factors Which Affect The Rate Of Reaction

945 words - 4 pages . Concentration is easy to measure and the rate of reaction will be easily determined. No advanced equipment is needed and accurate results can be gained without difficulty.PredictionsAn investigation of the affect of the concentration of the acid in the reaction between hydrochloric acid and sodium thiosulphate will be conducted. Using previous knowledge on the subject of rates of reaction and through research for the background information, it can be

Neutralisation Of An Alkali

1038 words - 5 pages Neutralisation of an Alkali In this investigation, I plan to find a pattern or rule in the neutralisation of an alkali. I plan to use hydrochloric acid and sodium hydroxide. I will use the indicator, phenolphthalein, to tell when the sodium hydroxide has been neutralised, which will turn from purple to clear. The Background of the Reaction ============================== The reaction is

Hydrolysis of Starch

1230 words - 5 pages atoms attached. (*many H atoms omitted) Assuming that the hydrochloric acid is acting only as a catalyst in the reaction, attempt an explanation of the chemical change which takes place in tubes 3 and 4. 9 In this experiment, the emphasis is on the conversion of starch to something else using hydrochloric acid. What control experiment would have to be carried out to show that hydrochloric acid played a significant part in

Experiment 4

586 words - 3 pages Aim To prepare a standard solution of sodium carbonate and to standardize a solution of sodium hydrochloric acid using sodium bicarbonate solution Apparatus : 250ml volumetric flask, weighing bottle, burette, pipette, and conical flask Chemicals : Sodium carbonate and hydrochloric acid Procedure A.Preparation of standard solution of sodium carbonate 1. A dry , clean empty weighing bottle is weighed using an analytical balance and the

Experiments to Determine the Effect of Acids & Bases

2019 words - 9 pages : To start off the experiment a lab coat and safety goggles were worn for safety reasons. Then a white tile was placed on the bench and then one drop of the chosen strong acid, Hydrochloric Acid 2M ( HCI ) was placed on the tile using an eyedropper. Then one drop of Phenolphthalein was placed on the tile so that it landed in the previous drop of Hydrochloric Acid. This colour reaction was noted and then recorded on a results sheet. The tile was

Rennin and Milk with Acid

619 words - 3 pages Time taken for the milk to Turn Solid through different concentrations of rennin Aim: To test what the effect of concentrations of hydrochloric acid has on a mixture of rennin and milk’s reaction rate. Hypothesis: As the hydrochloric acid becomes more concentrated, the mixture of rennin and milk will have a faster reaction rate. Variables: Independent- Concentration of hydrochloric acid Dependent- Reaction rate of rennin and milk

Related Papers

Rate Of Reaction Of Dilute Hydrochloric Acid And Sodium Thiosulphate

2323 words - 10 pages Rate of Reaction of Dilute Hydrochloric Acid and Sodium Thiosulphate To investigate the change in rate of reaction between DILUTE HYDROCHLORIC ACID and SODIUM THIOSULPHATE as the concentration varies. PLAN A chemical reaction takes place over a specific period of time i.e. which is the time for the reactants to be formed into the products. If the reactants take a relatively short time to form the products, the reaction is known

Sodium Thiosulphate Rates Of Reaction Essay

1883 words - 8 pages Sodium Thiosulphate Rates of Reaction During this investigation I am going to investigate the rates of reactions and which changes will affect this rate. A rate of reaction is when a reactant is lost or a new product is formed during a chemical reaction. I am going to investigate the effect of concentration by mixing Sodium Thiosulphate, Hydrochloric Acid and H2O (water) until the reaction takes place and the

The Effect Of Temperature On The Rate Of Reaction Between Sodium Thiosulphate And Hydrochloric Acid

1841 words - 8 pages The Effect of Temperature on the Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid I predict that as the temperature is increased the rate of reaction will increase. This means that the graph drawn up in my analysis will have positive link so it will look something like shown below, and will probably be curved as the increase in rate of reaction will not be exactly the same as the temperature is increased

An Investigation To Find Out How The Concentration Of Hydrochloric Acid Affects The Rate Of Reaction With Calcium Carbonate

2741 words - 11 pages An Investigation To Find Out How The Concentration Of Hydrochloric Acid Affects The Rate Of Reaction With Calcium Carbonate Background Knowledge I am doing this experiment to find out whether the concentration of hydrochloric acid affects the rate of reaction with calcium carbonate. In this experiment, when you add calcium carbonate (marble chips) to hydrochloric acid, carbon dioxide is given off. EQUATION