The unit ppb (parts per billion) is used for extremely dilute concentrations and represents one gram of solute per 10^9 grams of solvent, or one microgram of solute per kilogram of solvent. Suppose that 3.5 grams of phenol red indicator (chemical formula: C19 H14 O5  S ) are placed in an Olympic-sized swimming pool to determine the pH. (a) If the pool measures 50.0 meters long by 25.0 meters wide with an average depth of 2.75 meters, calculate the concentration of the indicator in parts per bill
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The units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 10^6 parts of solution. (Both solute and solution are measured using the same units.) Mathematically, by mass: ppm=(μg solute )/(g solution )=(mg solute )/(kg solution ) In the case of very dilute aqueous solutions, a concentration of 1.0 ppm is equal to 1.0 μg of solute per 1.0 mL . of solution, which equals 1.0 g of solution. Parts
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