When 0.7587g of an alloy is dissolved in a total volume of 50.0mL, the absorbanc

Question

When 0.7587g of an alloy is dissolved in a total volume of 50.0mL, the absorbance of the solution at 690nm, due to copper, is found to be 0.765. A 10.00ml aliquot of the solution is titrated with 0.0392 M KSCN solution and 8.25ml of the KSCN is required to reach the end point. Calculate:

a) grams of copper present in the alloy. I calculated that using the graph given ( 0.33g) and that answer is correct. I checked.

b) Percent copper in the alloy?

c) grams of silver in the aliquot? That answer is 0.0349g. Used the formula provided. Double checked the answer to be correct.

d) grams of silver in the alloy?

e) percent silver in the alloy.

Explanation / Answer

c) grams of silver in the aliquot? That answer is 0.0349g. Used the formula provided. Double checked the answer to be correct.

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