Sorry, but copying text is not allowed on this site. I stood up to allow more space for others to walk by between the rooms. Skip to main content. 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 reason why the actual rate constant, k, can be calculated is because in the experiments the change in concentration cannot be calculated.
Investigating the rates of reaction of Sodium thiosulphate and hydrochloric acid – Investigating the rates of reaction of Sodium thiosulphate and hydrochloric gcse Using my preliminary experiments I decided on using the following apparatus: Log In Sign Up. Sorry, but copying text is forbidden on this website! Experimentally I will be changing the concentrations of each the reactants independently and then calculating the rate for each concentration. We’ll occasionally send you account related and promo emails. Oops, we could not find the requested page. As soon as the chemicals were in, I started the timer.
In this investigation I will be varying the concentration of Sodium Thiosulphate thesis writing practice worksheets and not the Hydrochloric acid concentration. Finally I will not shake or move the conical flask once the reactants have been put together as this again might affect the rate of the reaction.
Sodium Thiosulphate & Acid
Papers] Research Papers words 3. Keep the size of my measuring flask is the same size; this should hopefully make my experiment much fairer and accurate.
I could test this by asking one of my peers to follow the instructions and then asking for their feedback. The timer was stopped when in see the black cross through the cloudy solution could no longer. Rates of reaction vary depending on which chemicals are being used and the activation energy required. The reaction will sodium and eventually the solutionwill turn completely opaque Free Essays words 5. I used this to gauge when to stop the reaction — when the black x was obscured by the white sulphur sodiuum, the timer was stopped.
Your Answer is very helpful for Us Thank you a lot! I have used reliable resources to research this information and it all confirms my conclusion.
This means its is hard to control this factor which is affecting the rate of the reaction. Hypothesis My prediction is that the reaction between sodium thiosulphate and acid will be fastest when the acid is at its highest concentration.
The conical flask and hydrocholric other equipment must be clean as any impurities may contaminate my experiment. This could have hydrochoric because of calculation errors, human errors, recording errors or a fault with the equipment that we used.
(DOC) GCSE CHEMISTRY RATES OF REACTION COURSEWORK | Anjelina Qureshi –
As well as environmental variations in temperature the reaction was exothermic and heat is produced. I will be changing this variable and seeing how it affect the time taken for the reaction to take place and therefore how the concentration affects the rate of the reaction.
Sodium Thiosulphate in Hydrochloric Acid. To reduce this error I would choose another method of measuring the rate.
Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid
How about receiving a customized one? Log In Sign Up. Click to learn more https: This can help me identify any faults. Nobody in my group was asthmatic but if they were, I would have carried out the experiment near a window or in a fume cupboard.
Another control is the the volume of reactants used and the depth of the solution. The independent variable in the experiment is the initial concentrations of Sodium Thiosulphate and Hydrochloric Acid. This is because the rate is determined by the rate of the slowest step of the mechanism, known as the rate determining step. The reaction gcse sodium reaction and HCL Length: I tied my hair back, tucked in my tie and pushed all stools and bags under the desk where there is no risk of anyone tripping.
This involves human judgement xoncentration than a qualitative value that can be used to calculated the rate. My data was quite accurate because all of my data follows a particular pattern and the points are all close together.
This shows that my data is quite accurate. I wrote down my results and then moved on to the next concentration of sodium thiosulphate. Click here to sign coursedork. Another error is in the variation of temperature.
The dependent variable is the time taken for the reaction to take place which can be used to calculate the rate of the reaction.