The stock solutions used in this PreLab are: 1.00 M stock solution of NaOH 6.00E

Question

The stock solutions used in this PreLab are: 1.00 M stock solution of NaOH 6.00E-04 M stock solution of Carmine Red Note that the Beer's Law constant (s) of Carmine Red is 4.80E + 04 L mol^-1 cm^-1 In the two runs of the reaction that are performed, each volume of stock solution used is diluted to a final volume as indicated in the table below. NOTE that this is before any mixing of the solutions occur. For run 1, what is the concentration (mol L^-1) of NaOH in the reaction mixture at t = 0 s? This is at the instant when the diluted solutions of NaOH and CR^+ are first mixed together: mmol NaOH/[Final Volume Diluted NaOH (ml) + Final Volume Diluted Cr+ (mL)] Enter a numeric answer only. Do not include units. Enter Your Answer:

Explanation / Answer

From the above shown data,

For run 1

Concentration of NaOH in the reaction mixture at t = 0 s

= mmol NaOH/total solution volume

= 1 M x 4 ml/(50 + 50)

= 0.04 mol/L

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