How do I determine the molar concentration of two substancesmixed together? For
ID: 677020 • Letter: H
Question
How do I determine the molar concentration of two substancesmixed together? For instance, I mixed Fe+3(aq) + SCN-(aq) = FeSCN+2(aq) Fe+3 solution had molarity of0.004M For the second solution, I mixed 1 g of KSCN in 15 mL ofdeionized water Then I mixed equal volumes of both of these solutions to getthe reaction above. How do I determine the molar concentration of two substancesmixed together? For instance, I mixed Fe+3(aq) + SCN-(aq) = FeSCN+2(aq) Fe+3 solution had molarity of0.004M For the second solution, I mixed 1 g of KSCN in 15 mL ofdeionized water Then I mixed equal volumes of both of these solutions to getthe reaction above.Explanation / Answer
Given that The molarity of Fe+3 solution =0.004M The maolrity of KSCN = (mass of / molar mass) /volume of solution in liters = (1 g / 97.1 g/mol) / 0.015 L =0.6866 M Let us assume volumeof Fe+3 solution is V1and volume of KSCN is V2 given that V1 = V2 Total volume of solution after mixing =V1 + V2 =2 V1 The molarity Fe+3solution aftermixing = 0.004 M*V1/2V1 =0.002 M The molarityFe+3solution after mixing = 0.6866M*V2/2V1 = 0.3433M (since V1 = V2) =0.002 M The molarity Fe+3solution aftermixing = 0.004 M*V1/2V1 =0.002 M The molarityFe+3solution after mixing = 0.6866M*V2/2V1 = 0.3433M (since V1 = V2) =0.002 M =0.002 M The molarityFe+3solution after mixing = 0.6866M*V2/2V1 = 0.3433M (since V1 = V2) =0.002 MRelated Questions
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