A 40,000 Gallon Swimming Pool Using The Soft Swim Method For Water Treatment Requires About 10 Pounds Of?
A 40,000 gallon swimming pool using the Soft Swim method for water treatment requires about 10 pounds of baking soda (sodium bicarbonate) to maintain the proper alkalinity and pH at the beginning of the swim season. What will be the initial molarity of the sodium bicarbonate in the pool water?
(i will give best answer to the one who answers his thoroughly for me) please help me.
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November 8, 2009 @ 3:36 pm
molarity is moles / L solution…
you have lbs NaHCO3 and gallons water.
so convert lbs NaHCO3 to moles…. and then assume volume water = volume solution…. then convert gallons water to liters…
10 lbs NaHCO3 x (454 g / 1 lb) x (1 mole NaHCO3 / 84.0 g NaHCO3) = 54.0 moles NaHCO3
40000 gal x (1000 L / 264.17 gal) = 1.51×10^5 L
so molarity = 54.0 moles / 1.51×10^5 L = 3.57×10^-4 M
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