1) A 0.000195M solution of [FeSCN]^+2 has an aborbance of 0.725. What would be t

Question

1) A 0.000195M solution of [FeSCN]^+2 has an aborbance of 0.725. What would be the concentration of another solution of the same complex ion whose aborbance is 0.554. Assume both of these solutions obey Beer's Law. Please show work.

2)If the absorbance of a 0.00045M solution of a gren colored complex ion is 0.371, what is the absorbance of a 0.0000592M solution of the same ion? Assume both solutions obey Beer's Law. Please show work.

3) 30.0ml of 0.400M glucose solution is mixed with 35.0 ml of 0.400M salt solution and sufficent water is added to make the total volume 100ml. What is the concentration of glucose and salt in the diluted solution?Please show work.

Explanation / Answer

1. As per beer lambart law

The absorbance of a solution is directly proportional to its concentration.

From given information

Absorbance of 0.725 is shown by 0.000195M solution.

So absorbance of 0.554 would be shown by (0.000195/0.725)×0.554M solution

Hence concentration is 0.000149

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