5. Out on the Great Salt Lake, the brine in the large salt evaporation ponds mus

Question

5. Out on the Great Salt Lake, the brine in the large salt evaporation ponds must be pumped through a series of different ponds, moving from one pond into the next when the sodium chloride reaches the right concentration as the water evaporates. In this case, it's time to move the brine when the concentration of salt is 22%(w/w). You test the brine with your portable refractometer, yielding a Brix value of 22.1°Bx. Is the brine ready to move to the next pond? Do you start the pump... or wait a day or two more?

Explanation / Answer

Ans. Yes, the brine is ready to move to the next pond.

# Given- standard [NaCl] in brine for its movement to the next pond = 22 % ( 2 significant figures)

            Experimental [NaCl] in brine for its movement to the next pond = 22.1 % = 22 % ( rounded off to 2 significant figures)

# Leaving the brine for one or two more days will cause further concentration of the brine due to evaporation. So, experimental [NaCl] in the brine is likely to increase in an un-accountable manner because rate of evaporation is NOT mentioned. Therefore, since the experimental [NaCl] meets the minimum standard [NaCl] in the brine, the specified solution shall be moved to the next pond in process.

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