题目
题目

M2LA F25 Expt 2 PreLab Quiz

多重下拉选择题

The 0.012 M stock solution can be diluted to create the 5 standard aqueous solutions of (NH4)3Fe(ox)3.3H2O with concentrations between 1.0 x 10-3 M and 7.5 x 10-3 M.   If each of the standard solutions is created in a 10.00 mL volumetric flask, what volume of stock solution is needed to create each of the following concentrations: 2.4 x 10-3 M: [ Select ] 3.5 5 1 3 2 7 2.5 6 8 4 mL 3.6 x 10-3 M: [ Select ] 3 2 1 5 4 3.5 mL 4.8 x 10-3 M: [ Select ] 2 5 3 4 2.5 mL 6.0 x 10-3 M: [ Select ] 4.5 6 5.5 4 5 mL 7.2 x 10-3 M: [ Select ] 3 1 6 5 mL What piece of glassware should be used to deliver these volumes? [ Select ] volumetric flask graduated cylinder beaker volumetric pipet disposable pipet    

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The problem asks for the volumes of a 0.012 M stock solution needed to prepare 10.00 mL of several diluted standard solutions, using the relation M1V1 = M2V2 (where M1 is stock concentration, V1 is the volume of stock used, M2 is the desired concentration, and V2 is the final volume, 10.00 mL). For each target concentration, compute V1 = (M2 × V2) / M1 with V2 = 10.00 mL and M1 = 0.012 M. - 2.4 x 10^-3 M in 10.00 mL: V1 = (2.4 x 10^-3 × 10.00 mL) / 0.012......Login to view full explanation

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