5-27. Students performed an experiment like that in Figure 5-7 in which each fla

Question

5-27. Students performed an experiment like that in Figure 5-7 in which each flask contained 25.00 mL of serum, varying additions of 2.649 M NaCl standard, and a total volume of 50.00 mL.

Flask

1

2

3

4

5

Volume of Standard (mL)

0

1.000

2.000

3.000

4.000

Na+ atomic emission signal (mV)

3.13

5.40

7.89

10.30

12.48

(a) Prepare a standard addition graph and find [Na+] in the serum.

(b) Find the standard deviation and 95% confidence interval for [Na+]                                                   

Explanation / Answer

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