Scenario: You are an engineer supervising the work on a brownfield remediation p

Question

Scenario: You are an engineer supervising the work on a brownfield remediation project. Just before the close of business, as you are grabbing your coat, you notice one of your coworkers left some stock solutions out on the bench. Thinking you can quickly put them away and then go home, you walk over to do so, but you discover instead that the labels have not been put on the stock containers. There are labels on the counter, in front of the containers, but they have not been printed yet. There are four colorless glass containers, two of which contain a clear, colorless solution. The other two solutions have a dark bluish-green color.

Over to the right are a number of containers that had been used recently. These containers contain chemical compounds, in solid form, that are commonly used in your lab. They are: barium nitrate, nickel (II) chloride, potassium nitrite, iron (III) nitrate, lithium sulfate, aluminum nitrate, sodium bromide, lead (II) chloride, calcium nitrate and magnesium fluoride.


1. If you were actually confronted with this situation, would you put labels on the containers or
would you dispose of the solutions? Explain your answer.

Explanation / Answer

There are only two colored salts viz Nickel (II) chloride, iron (III) nitrate,

Nickel (II) chloride , has dark bluish green color

Iron (III) nitrate, is deliquescent, and hence it is commonly found in its nonahydrate form Fe(NO3) 9H2O in which it forms pale violet crystals.and its solution is brownish in color.

So I wll label the bottles containing the green solutions NiCl2

The solutions of barium nitrate, , potassium nitrite, lithium sulfate, aluminum nitrate, sodium bromide, lead (II) chloride, calcium nitrate and magnesium fluoride. are all colorless. So it is not possible to decide on the nature of the two colorless solutions.So I will dispose of the colorless solutions.

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