Sodium Thiosulphate and Hydrochloric Acid Coursework. The independent variables in our experiment are the concentration of hydrochloric acid. In case of contact, immediately flush skin with plenty of water for at least 15 minutes and with eye contact get medical attention immediately. Rates of reaction vary depending on which chemicals are being used and the activation energy required. This energy gives the reactant particles enough energy to collide with enough force to break apart the bonds so that new products can be made from atoms.
Whilst standing above the conical flask, looking directly down, simultaneously pour the first concentration of Na2S2O3 into the conical flash and start the stopwatch. This fits in with my hypothesis and my data. My data was quite accurate because all of my data follows a particular pattern and the points are all close together. The method I will be using is by seeing how long it takes for a black cross underneath the conical flask to disappear which will be the point in all the reactions where the concentration of the sulphur precipitate is equal and so will the rate can be fairly calculated. It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and metal cleaning.
This is very important because loose hair can not only get dipped into chemicals but can also obscure vision. Also, it has a narrow top and so it is safer. I had to make sure that my classmates were safe as well as myself. To reduce errors I will need to use my preliminary results to find a volume that will give a long enough time to measure accurately, but not too long to affect the rate which is calculated by dividing initial concentration by time.
There is one outlier in 2M concentration. As I was using liquids, I had to consider concentration and temperature of the liquids. Sulphur is also present so make sure the room is well ventilated to allow fumes to escape.
There are a few mild outliers. The dependent variable is the one that will be monitored in the reaction. These chemicals are perfect for my investigation because they are both clear and colourless. This shows that as you increase the independent variable the concentrationthe other variable the time taken for the experimentwent down. From these rates I will be able to draw a log graph of rate against concentrations and from my calculation I can find the orders for each of the reactants. I used this to gauge when to stop the reaction — when the black x was obscured by the white adn precipitate, the timer was stopped.
To control this the same volumes will be used and the same conical flask will be used and therefore the depth will be the same. Use of rate of hydrocbloric in industry The chemical industry makes medicine and many other substances such as; Limestone – this is used for building Sulphuric acid — used to make other substances Ammonia – used to make fertilisers.
Help Center Find new research papers in: I could test this by asking one of my peers to follow the instructions and then asking for their feedback. Secondly replace the Sodium Thiosulphate with the HCl and copy above steps by measuring out correct concentrations and place into 5 more 50cm3 beakers.
The dependent variable was the rate of reaction. I have used reliable resources to research this information and it all confirms my conclusion. This is because there will be more acid molecules in thiosulphtae same amount of solution, therefore more effective collisions with the sodium thiosulphate, and the rate will be higher.
Sodium Thiosulphate and Hydrochloric Acid Coursework Essay
The method I will be using is by seeing how long it takes for a black cross underneath the conical flask to disappear which will be the point in all the reactions where the concentration of the sulphur precipitate is equal and so will the rate can be fairly hjdrochloric. The easiest would be using a gas syringe to measure the amount of SO2 formed. This again would give a more quantitative results and thiosulphats the accuracy and reliability. I did, however find some outliers in my results.
(DOC) GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi –
Sodium thiosulphate is a colourless, crystal like compound and is used for dyes and is also a salt. My Error bar graph shows a negative correlation. I am investigating the different factors which may speed up chemical reactions. On my ROR graph, there is a positive correlation.
Rate of Reaction – Sodium Thiosulphate and Hydrochloric Acid Coursework
This will show me the affect of each reactant on the rate independently. I stood up to sldium more space for others to walk by between the rooms. It can also be found in the stomach. When the solution is made more concentrated, there are a greater number of molecules in the same space. Another error is in the variation of temperature.