Answer :
To find the pounds of KCl required to obtain a 12% KCl solution, multiply the weight of the solution by the KCl concentration as a decimal.
To find the pounds of KCl required, we can use the formula:
Pounds of KCl = Weight of solution (in pounds) * KCl concentration (as a decimal)
Given that the KCl water is 12%, we can convert it to a decimal by dividing by 100: 12/100 = 0.12.
Therefore, the pounds of KCl required = 170 barrels * 0.12 = 20.4 barrels.
So, the answer is None of the above, as none of the given options match with 20.4 barrels.
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