Need help with my lab report calculations. All work must be shown for full point

Question

Need help with my lab report calculations. All work must be shown for full points thanks!!

Use the following data obtained with mV/pH meter equipped with electrode for direct Cl- measurement to prepare a graph plot of mV vs log Cl- concentration (ppm) for standards. Use the calibration curve to determine the % of [Cl-] in the unknown Cl sample.

The unknown chlorine sample diluted with a 1:15 ratio. 4mL of the unknown was diluted with 60 mL of DI water. The standards were prepared from a 10,000 ppm stock solution.

Data mV reading 10 ppm Cl- standard 149.7 100 ppm Cl-? standard 127 1000 ppm Cl-? standard 83.7 Unknown Cl- sample 106.1

Explanation / Answer

Just get an excel sheet

Plot the next data

x-axis = log of Concentrations given in ppm

y-axis = mV reading value

You should get a straigth line

right click and click in "add-trendline"

add a striagh line, you should get a equation

Substitute the data given to answer it

4ml of unknown in 60 ml dilution

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