Thermometric Titration Supplemental
You have the basic writeup of what a thermometric titration is. This is a supplement to the original writeup, as we cannot do it as described. You will have to add the unknown acid (the titrant) to the known base (the analyte) by hand using the buret, but you will have an electronic stirrer so that no one has to swirl the beaker. You must use a digital thermometer to record temperature changes, making sure you take note the maximum temperature of the reaction. You must make consistent readings of the volume of the acid used until the temperature stabilizes. I did find an additional supplement in Word to help you out.
You will do this lab twice with hydrochloric acid (HCl) and twice with ethanoic acid (CH3COOH). These reactions are exothermic, so there will be temperature changes.
I'm not 100% sure Excel can graph thermometric titration data, but you should try to see if it does. If it doesn't work, then the graph must be done by hand.
You will work in one big group, as we only have one magnetic stirrer. Someone should be responsible for reading the buret, someone should be responsible for adding the acid, someone should be responsible for taking the temperature readings, and someone should be in charge of the entire process.
Once the graph is complete, determine the volume of HCl required to neutralize NaOH. Look at the x-axis at the point where the lines cross--that's the volume.
You need to reference the following reaction: NaOH(aq) + HCl(aq) --> NaCl(aq) + H2O(l) The ratio of NaOH to HCl is 1:1, so you can use that to determine the concentration of HCl, using n = cV to complete the calculations.
Below I have posted three short videos so that you know what to do and the kind of data you should collect. On Thursday, you guys will set up the lab so that when you come in on Friday, you can start collecting data. You will have two double periods to collect all your data, so the lab won't be finished until October 8, 2019.
You will do this lab twice with hydrochloric acid (HCl) and twice with ethanoic acid (CH3COOH). These reactions are exothermic, so there will be temperature changes.
I'm not 100% sure Excel can graph thermometric titration data, but you should try to see if it does. If it doesn't work, then the graph must be done by hand.
You will work in one big group, as we only have one magnetic stirrer. Someone should be responsible for reading the buret, someone should be responsible for adding the acid, someone should be responsible for taking the temperature readings, and someone should be in charge of the entire process.
Once the graph is complete, determine the volume of HCl required to neutralize NaOH. Look at the x-axis at the point where the lines cross--that's the volume.
You need to reference the following reaction: NaOH(aq) + HCl(aq) --> NaCl(aq) + H2O(l) The ratio of NaOH to HCl is 1:1, so you can use that to determine the concentration of HCl, using n = cV to complete the calculations.
Below I have posted three short videos so that you know what to do and the kind of data you should collect. On Thursday, you guys will set up the lab so that when you come in on Friday, you can start collecting data. You will have two double periods to collect all your data, so the lab won't be finished until October 8, 2019.