Question: Standard addition graph. Students performed an experiment like that in Figure 5-7 in which each flask contained 25.00 mL of serum, varying additions of 2.640

Standard addition graph. Students performed an experiment like that in Figure 5-7 in which each flask contained 25.00 mL of serum, varying additions of 2.640 M NaCl standard, and a total volume of 50.00 mL.

(a) Prepare a standard addition graph and find [Na+] in the serum.
(b) Find the standard deviation and 95% confidence interval for [Na+].

Na atomic emission signal (mV) 3.13 5.40 7.89 10.30 12.48 Volume of standard (mL) Flask 0 1.000 2.000 3.000 4.000 4

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