You have to calibrate the measurement by running the experiment with a series of standard solutions one at a time. A series of dilution should be prepared. Begin with the measurement of the potential of the least concentrated solution as the potential measurement desensitize the ion selective electrode to some extent.
Answer question 3 please Solve question 3 please asap EXPERIMENT 9: ION-SELECTIVE ELECTRODES The determination of...
QUESTION 3 Answer ALL parts. [Marks: (a) 50% (b) 25% (c) 2596] Q 3(a) i Using the Nernst equation, explain why a silver/silver chloride electrode can function as either a chloride, Cr, potentiometric sensor (lon Selective Electrode, ISE) OR as a reference electrode. i) Draw a labelled diagram of an electrochemical cell where the silver/silver chloride electrode acts as an lon Selective Electrode Q 3(b) A potential of 0.37 V was observed when a chloride, Cl, lon Selective Electrode was...
5. What was the purpose of the NaNO3 solution in this experiment? 6. Could a solution of NaCl be used instead of NaNO3? 7. What was the purpose of FeSO4 solution in this experiment? 8. Could a solution of FeCl, be used instead of FeSO4? 9. Could a solution of NaSO4 be used instead of FeSO4? 10. Calculate the standard cell potential for the spontaneous redox reaction between a Pb(s)/Pb(NO3)2(aq) half-cell and a Ag(s)/AgNO3(aq) half-cell. Which metal would be oxidized?...
This is from a Study of Buffer Solutions and pH of Salt Solutions Lab. I calculated Ka to be 3.2*10^-5. Why is my value larger than the standard value? Procedure: 10. How does your calculated value of Ka compare with the standard value of Ka for acetic acid? Discuss why your value may be larger or smaller than the standard value. Caleutats Ka 3.2x 10-5) Cyato-s Learning Objectives: 1. To test the acidic and basic properties of ionic compounds 2....
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
I know some of the measured pH values are a little off due to error in the lab, but I need help filling out the “Ion Hydrolyzed” table and then the “Net Ionic Equation” part. I remember doing net ionic equations in General Chemistry I, bit don’t see how it applies here. Thanks, in advance! (i will rate!) Learning Objectives: 1. To test the acidic and basic properties of ionic compounds. 2. To create a buffer solution and calculate its...
please help answer question 4, a-f please using the data below from chart 1 objectives from lab, thank you DATA:CA y 3 Ay No3 Part I: Cell Potential of voltaic cells under standard conditions: cell CU CND2 #27 14.0m Give the half Half cell reaction at Combinations Oxidation Reduction E the anode and with [ion] takes place Theoretical takes place cathode. Write in M here here (V) above the arrow E c (V) if it is oxidation or reduction. |-0.340...
I need help with the problem in the last photo.. I thought I’d post my lab explanation and data if that helps you get a better understanding, but it’s just the question at the end. I know I need to use the Henderson Hasselbach equation.. so... 4.70 = pKa + log( [acetate-ion] / [acetic-ion] ) and solve for pKa, then Ka.. but how do I find the concentrations to put in the log fraction? Thanks, in advance! Learning Objectives: 1....