If the current price of gold is $1637.39 per ounce and the cost of Au(NO3)3 is $

Question

If the current price of gold is $1637.39 per ounce and the cost of Au(NO3)3 is $250.00 per 10.00 mL at 0.0250 M, Is this reaction economical? In other words, will he make a net profit? (1 ounce = 28.35 g) Show how you came to your conclusion. Give your answer in complete sentences. Some people may argue that the friend kept the bottle of the Au(NO3)3 solution uncapped on purpose. Assuming that it is a possibility, state using complete sentences, the reason(s) behind his decision. Also, state, using complete sentences, if the behavior of the friend would constitute a breach of personal and professional ethics. Do you think that this experiment to produce gold In the laboratory will draw worldwide attention? Which countries of the world will the experiment attract attention the most? Explain your answer using complete sentences.

Explanation / Answer

Moles of Au(NO3)3 or moles of Au = 0.0250 moles/litre * (0.010 litre) = 0.00025 moles

0.00025 moles * 197 g/mole = 0.04925 g

Cost of 0.04925 g = 250$

Cost of 1 g of Au = 1g * 250$

1 0.04925 g

= 5076 $

Cost of 1 gram of gold = 1 g * 1637.39$

1 28.35 g

= 57.76$

Yes he will not make a profit since the reaction is too expensive [5076$] than market price [57.76$] per gram

(g)

Bottle uncpaped absorbs moisture from air [water] and forms following reaction:

2Au+3 + 3H2O + 3HNO2aq --> 2Au + 6H+aq + 3HNO3 (aq)

Nitrous acid is fairly reactive, and can act as either a reducing or an oxidizing agent. It will reduce the dissolved gold (Au+3) to elemental form (Au). This explains why the gold precipitates back out when the reaction is diluted with water.

So by not capping the bottle, soem of the gold will get un-dissolved and precipiate out due to reactioon with atmosphere's water vapor and hence the concentartion of Au(NO3)3 no more remains same and its unprofessional ethics

.

(h) This experiment is not attractive way to produce gold as it is too expensive. But in a way this method of prearation can reduce the amount of gold in the solution

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