SOLUTION: Please help. Thankyou.
An aquarium owner tested the chemical levels of the water in her 50 gallon tank. The water tested with a level of 2% of a certain chemical. She wanted to
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Question 719910: Please help. Thankyou.
An aquarium owner tested the chemical levels of the water in her 50 gallon tank. The water tested with a level of 2% of a certain chemical. She wanted to drop the level to a safe level of 1.25% How much of the aquarium water should be removed and pure water added to the aquarium?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = gallons of water to be removed and
replaced with pure water
The owner starts out with gallon of the chemical
The gallons of chemical that are removed when the water is drained
is
Note that there are 50 gallons at the start and 50 gallons at the end
----------------
18.75 gallons should be drained and replaced with pure water
check:
OK
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