Question

Pre-lab Calculations: The reactant concentrations given in the procedure are not the concentra- tions of the solutions once everything is mixed together. Once the reactants are mixed, the volume of the overall solution increases to 50.00mL for all trials. You will need to use the dilution equation (M, V = M,V.) to calculate the concentrations of each reactant ion. Reaction Mixture Reaction Mixtures at Room Temperature (Reagent volumes in ml) Reaction Flask A Reaction Flask B 0.010M KI 0.0010M Na,s,o, H.0 0.040M KBro, 0.10M HCI 10 10 10 10 10 I 20 10 To 10 10 10 10 1 0 20 10 I 10 T 10 To 10 20 8 10 12 5 15 1 2 3 4 I I Reaction Mixture Concentration of Regents after mixing квго, кі на Show your work for the calculation for Reaction Mixture 1 below. Write the concentrations of the reagents after mixing in your data table in the postlab as well as in the table above

Answer 1

To find the concnetration after dilution, we have eto use the formula

M1V1 = M2V1

Thus M2 = M1V1 / V2

where M1 = Initial concentration

V1 = Initial volume

M2 = Final concentration

V2 = Final volume after dilution.

Giiven the final voolume of the mixture for all (V2) = 50 ml.

Thus the final concentrations will be-

Reaction mixture	KI	KBrO3	HCl
1	M2 = MIV1/ V2 = 0.010 M* 10 ml/ 50 ml = 0.002‬ M	M2=MIV1/V2 = 0.040 M* 10 ml/ 50ml = 0.008‬ M	M2 = MIV1/ V2 = 0.10 M* 10 ml/ 50 ml = 0.02‬ M
2	M2 = MIV1/ V2 = 0.010 M* 20 ml/ 50 ml = 0.004‬ M	M2 = MIV1/ V2 = 0.040 M* 10 ml/ 50 ml = 0.008‬ M	M2 = MIV1/ V2 = 0.10 M* 10 ml/ 50 ml = 0.02‬ M
3	M2 = MIV1/ V2 = 0.010 M* 10 ml/ 50 ml = 0.002‬ M	M2 = MIV1/ V2 = 0.040 M* 20 ml/ 50 ml = 0.016‬ M	M2 = MIV1/ V2 = 0.10 M* 10 ml/ 50 ml = 0.02‬ M
4	M2 = MIV1/ V2 = 0.010 M* 10 ml/ 50 ml = 0.002‬ M	M2 = MIV1/ V2 = 0.040 M* 10 ml/ 50 ml = 0.002‬ M	M2 = MIV1/ V2 = 0.10 M* 20 ml/ 50 ml = 0.04‬ M
5	M2 = MIV1/ V2 = 0.010 M* 8 ml/ 50 ml = 0.0016‬ M	M2 = MIV1/ V2 = 0.040 M* 5 ml/ 50 ml = 0.004‬ M	M2 = MIV1/ V2 = 0.10 M* 15 ml/ 50 ml = 0.03‬ M