Question

Co(ll) was used as an internal standard to analyze a sample of Ti(IV) with atomic absorption spectroscopy (AAS), A standard mixture containing 1.04 pg Co/mL and 2.29 pg T/ml measured by AAS produced a signal-to-signal ratio of 2.82 TI : 1.00 Co. A mixture was prepared by combining 5.50 ml of a Ti(IV) solution of unknown concentration with 3.00 mL of a 12.6 ug/mL solution of Co(IT). The absorbance of the mixture all the Ti(IV) wavelength was 0.128 and the absorbance at the Co(IT) wavelength was 0.182 Determine the concentration, in moles per liter of Ti(V) In the original unknown solution MTI(IV) concentration:

Answer 1

To determine the concentration of Ti(IV) in the unknown solution, we can use the signal-to-signal ratio and the absorbance values of the mixture. First, we calculate the concentration of Co(IT) in the mixture. Next, we calculate the concentration of Ti(IV) in the mixture. Finally, we can calculate the concentration of Ti(IV) in the unknown solution.

Step-by-step explanation:

To determine the concentration of Ti(IV) in the unknown solution, we can use the signal-to-signal ratio and the absorbance values of the mixture. From the signal-to-signal ratio, we know that the ratio of Ti(IV) to Co(II) in the standard mixture is 2.82:1. We can use this ratio to calculate the concentration of Ti(IV) in the unknown solution.

First, we calculate the concentration of Co(IT) in the mixture:

Concentration of Co(IT) = 1.04 pg/mL x 2.82 = 2.92 pg/mL

Next, we calculate the concentration of Ti(IV) in the mixture:

Concentration of Ti(IV) = (0.182 - 0.128) / 2.29 pg/mL = 0.023 mol/L

Finally, we can calculate the concentration of Ti(IV) in the unknown solution:

Concentration of Ti(IV) in the unknown solution = (0.023 mol/L) x (3.00 mL + 5.50 mL) / 5.50 mL = 0.059 mol/L

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