We’ll occasionally send you account related and promo emails. This gives evidence to the mechanism of the reaction. Log In Sign Up. My data was precise because most of the points on my graphs are close to the line and are all close by each other. Sodium Thiosulphate and Hydrochloric Acid Coursework.

Secondly replace the Sodium Thiosulphate with the HCl and copy above steps by measuring out correct concentrations and place into 5 more 50cm3 beakers. Hydrochloric acid is colourless, poisonous and highly acidic. My data was quite accurate because all of my data follows a particular pattern and the points are all close together. In case of contact, immediately flush skin with plenty of water for at least 15 minutes and with eye contact get medical attention immediately. The points in the top right are quite far down so this shows a negative correlation.

I think this because there is outliers in the 2M set of data and the error bars overlap between 1M and 2M on my error bar graph. We’ll occasionally send you account related and promo emails.

Sodium Thiosulphate + Hydrochloric Acid Coursework – GCSE Science – Marked by

This makes sure that my experiment runs smoothly. Aim My aim is to investigate how changing the concentration of reactants can change the rate of reaction between hydrochloric acid and sodium thiosulphate.

Reactions that occur slowly have a low rate of reaction. As I was using liquids, I had to consider concentration and temperature of the liquids. To control the temperature I could use a large water bath which could control the temperature throughout the reaction.

The first variable that must be controlled is the temperature of the reactions. After drawing a graph of logRate against logConcentration and using the calculations in my plan, the gradient of the line gave me a value of 0. This means its is hard to control this factor which is affecting the rate of the reaction.

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It is often used as a chemical intermediate and in petroleum production, food processing, pickling, and metal cleaning. The size of the error bars is quite small so I think I can say that my data is quite accurate except for the 2M result which is quite a long error bar. I also made sure that any clothing or long jewellery was clear and out of our way as clothing can also get caught. This increases the likelihood of reactants colliding properly and so sodkum the rate of the chemical reaction.

sodium thiosulphate and hydrochloric acid coursework

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 conical flask and all other equipment must be clean as any impurities may contaminate my experiment. It can also be found in the stomach. Sorry, but copying text is forbidden on this website! I could have use a colorimeter to identify colour changes in the thhiosulphate.

I stood up to allow more space for others to walk by between the rooms. If the temperature varies between reactions it will have an affect on the results.

Rate of Reaction – Sodium Thiosulphate and Hydrochloric Acid Coursework

Help Center Find new research papers thjosulphate Accessed May 23, When the temperature increases the k constant will increase, this is because the molecules have more kinetic energy and there is a higher probability that they will collide and react.

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I also made sure that the measuring cylinder was on a level surface so that I could clearly see how much liquid I was putting in hdrochloric it. The enthalpy change is the amount of heat absorbed or released when a chemical reaction occurs at a constant pressure.

Sodium Thiosulphate and Hydrochloric Acid Coursework.

(DOC) GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi –

We use cookies to give you the best experience possible. The independent variables in our experiment are the concentration of hydrochloric acid. For example, when my concentration was 1M the average reaction time was seconds, and then when the concentration was 5M the average reaction time was seconds.

sodium thiosulphate and hydrochloric acid coursework

A limitation of my procedure was the way in which the rate was calculated using the disappearing cross method. Conclusion In my investigation, my data and my graphs proved that my hypothesis was correct.

sodium thiosulphate and hydrochloric acid coursework

I tucked in my tie and shirt, and took off my blazer. There are a few outliers in my results. Using white paper helped the marking to stand out.

This good because it shows that for every increase in concentration is a decrease in rate of reaction. To do this I would make sure that: