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23 Nov 2019

Consider the data below:

Sample [Na+] (M) [Na+] (mg/8 fl. oz.) Intensity
Standard 1 0.001090 6 100
Standard 2 0.000870 4.8 83
Standard 3 0.000652 3.6 64
Standard 4 0.000435 2.4 44
Standard 5 0.000217 1.2 24
Standard 6 0.000000 0.0 0

Gatorade - - 29.8

a) Using the spreadsheet Excel, find the equation for bothcalibration curves, Intensity vs. molarity and Intensity vs. mg/8fl. oz.:

"y=mx + b" corresponds to "I=m[Na+] + b" where I =Intensity

Molarity plot:

m (3 significant figures) = Your answer is correct.

b (2 significant figures) = Your answer is correct.

mg/8 fl. oz. plot:

m (3 significant figures) = Your answer is correct.

b (2 significant figures) = Your answer is correct.

b) If the gatorade (this is fictional gatorade - not the realvalue) has been diluted by a factor of 25 and reads 29.8 intensityunits, what is the concentration of Na+ in the original gatorade?(3 significant figures for both)

molarity M

mg/8 fl. oz.

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