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Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the dichromate in the solution?

A. Based on the data above, To make 50.0 mL of the stock solution how many grams are needed of K2Cr2O7?(M1V1=M2V2)

B. What is the concentration of [Cr2O7 ^-2] in the first dilution add that is made by adding 1.00 mL of DI water to 5.00 mL of the stock potassium dichromate solution?

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