![]() ![]() ![]() In serial dilutions, you multiply the dilution factors for each step. You would thus say that the stock solution was diluted by a factor of #m#, where #m# is the ratio of the two given concentrations.Īlternatively, you can say that you performed a #1:m# dilution.How do you calculate the dilution factor of a serial dilution? Since the concentration of the stock solution is higher than the concentration of the diluted solution, you can express the former as a multiple of the latter This means that the dilution factor will be Rearrange to get the volumes of the two solutions Since the number of moles of solute, #n#, is constant for both solutions, you can say that #c_2 -># the molarity of the diluted solution #c_1 -># the molarity of the concentrated solution Let's say that you don't know the values of the two volumes, which we'll call #V_1# and #V_2#, but you do know the concentrations of the two solutions Now, the dilution factor is simply the ratio between the final volume of the diluted solution and the initial volume of the concentrated solution. Since the number of moles of solute must remain constant, the only way to achieve the decrease in concentration is to increase the volume of the solution by adding more solute. ![]() ![]() The purpose of a dilution is to decrease the concentration of the solution. #color(blue)("molarity" = "moles of solute"/"liter of solution")# The underlying principle when performing a dilution is the fact that the number of moles of solute must remain constant.Īs you know, the concentration of a solution is defined as the number of moles of solute per liter of solution. You can start by making sure that you understand what it means to dilute a solution. ![]()
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