Chemistry - Concentration Terms Question with Solution | TestHub
How much chlorine should be added to a 30000 litre capacity of pool in order to obtain 2.5 ppm of chlorine.
Options:
Answer:
Solution:
Explain the Question : Find chlorine volume for 2.5 ppm
Concept : This question is based on parts per million (ppm) & density.
Solution : For dilute aqueous solutions like a pool, ppm (parts per million) is defined as milligrams of solute per litre of solution (mg/L). The concentration is 2.5 ppm (or 2.5 mg/L) and the pool volume is 30,000 L. First, calculate the required mass of chlorine : Mass Concentration Volume . Converting this to grams gives 75 g Since the options are in millilitres (mL), a unit of volume, we must assume the density of the substance being added is (the density of water), a common simplification in such problems. Therefore, volume = Mass/Density = .
Final Answer : C