Make a plot of the data in Table 2 (Experiment 7, Discussion) on the supplied gr

Question

Make a plot of the data in Table 2 (Experiment 7, Discussion) on the supplied graph paper on the reverse of this page. Below write the value of lambda for Erythrosin B as determined from your graph. Also, write this value in the DATA Section A. Lambda = You pipet 2.00 ml of 2.46 times 10^-2 M HCI into a 50.00 mL volumetric flask. What is the molarity of the diluted solution? In order to better understand the dilutions you will prepare in part A, "Calibration Curve, " complete the following schematic drawing of the procedure that is described in this section. (Assume initial stock solution contains 0.7340 g Erythrosin B per liter.)

Explanation / Answer

Q2.

moles are conserved

mol in solution 1 = mol in solution 2

so

M1V1 = M2*V2

solve for M1:

M1 = M2*V2/V1

M1 = (2.46*10^-2)*(2)/50

M = 0.000984 mol per liter

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