This is your experimental data for Experiment #8, Determination of Ca in a Supplement by Ion Selective Electrode. YOU MUST READ THE EXPERIMENTAL WRITE-UP AND COMPLETE THE PRE-LAB PRIOR TO DOWNLOADING THIS DATA!! Your unknown number is: 1145 Your sample weighed 1.5040 grams You follow the procedure making up your unknown. You made your standards, and when you measured them on the ISE meter produced the following data: Standard A has a meter reading of -40.01 mV Standard B has a meter reading of -70.31 mV Standard C has a meter reading of -96.85 mV Standard D has a meter reading of -106.14 mV The unknown has a meter reading of -88.08 mV Concentration of standard: 0.01, 0.001, 0.0001, 0.00005 (put them on Y axis as log(conc)) Produce and submit a spreadsheet with a PROPERLY LABELLED calibration curve graph with a linear least square calculation of the best fit line. Calculate the following in CLEARLY LABELLED cells in your spreadsheet. The slope = 28.425 The intercept = 16.284 The R2 value = 0.9991 The total amount of Ca in the unknown you were given at the start of the experiment = ___ mg The wt% of Ca in the unknown = ___ %