classify each of the following elements classify each of the following elements

Question

classify each of the following elements classify each of the following elements classify each of the following elements classify each of the following elements classify each of the following elements classify each of the following elements Print Calculator Penodic Table Question 27 of 27 Map dob Sapling Learning Determine the concentrations of MgC2, Mg, and Cr in a solution prepared by dissolving 2.45 x 104g MgCh in 1.75 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm) Number Number Number Mg . ppm Number Number ppm O Previous GiveUp & View Souton e Check Answer 0Neri Et

Explanation / Answer

Concentration of MgCl2 = Mass/Volume = (2.45 x 10-4/1.75) g/L = 1.45 x 10-4 g/L

Molarity = Concentration (g/L) / MW = 1.45 x 10-4/95.21 = 1.52 x 10-6 M

[MgCl2] = 1.52 x 10-6 M

[Mg2+] = 1.52 x 10-6 M = 1.52 x 24.31 x 10-6 g/L = 3.70 x 10-5 g/L = 3.70 x 10-2 mg/L = 3.70 x 10-2 ppm

[Cl-] = 2 x 1.52 x 10-6 M = 3.04 x 10-6 M = 35.5 x 3.04 x 10-6 g/L = 1.08 x 10-4 g/L = 1.08 x 10-1 mg/L =

                                                                                                                                                        1.08 x 10-1 ppm

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