As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chip products for the packaging label. The potato chips are seasoned with table salt, NaCl. You weigh out a handful of the chips (78.5 g), boil them in water to extract the salt, and then filter the boiled chips to remove the soggy chip pieces. You then analyze 100.0 mL of the chip filtrate for Cl- concentration using the Mohr method. 1. First, you prepare a solution of AgNO3, and standardize it using 0.500 g KCl as the primary standard. Calculate for the concentration (in M) of the standard AgNO3 solution if it takes 64.5 mL of the AgNO3 titrant to reach the equivalence point of the reaction. Write the balance chemical reaction between the standard and the titrant. 2. You then use the standardized AgNO3 solution to analyze the chip filtrate in a Mohr reaction, finding that the solution yields a rusty brown precipitate when 48.8 mL of titrant is added. Calculate for the concentration (in M) of NaCl present in the potato chips filtrate. 3. Draw the titration curve for the analysis of the chip filtrate after the addition of the following volumes of AgNO3 solution: 15.0 mL, 24.4 mL, 48.8 mL, 49.5 mL and 50.0 mL. Ksp for AgCl is 1.6x10-10.
As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chip products for the packaging label. The potato chips are seasoned with table salt, NaCl. You weigh out a handful of the chips (78.5 g), boil them in water to extract the salt, and then filter the boiled chips to remove the soggy chip pieces. You then analyze 100.0 mL of the chip filtrate for Cl- concentration using the Mohr method.
1. First, you prepare a solution of AgNO3, and standardize it using 0.500 g KCl as the primary standard. Calculate for the concentration (in M) of the standard AgNO3 solution if it takes 64.5 mL of the AgNO3 titrant to reach the equivalence point of the reaction. Write the balance
2. You then use the standardized AgNO3 solution to analyze the chip filtrate in a Mohr reaction, finding that the solution yields a rusty brown precipitate when 48.8 mL of titrant is added. Calculate for the concentration (in M) of NaCl present in the potato chips filtrate.
3. Draw the titration curve for the analysis of the chip filtrate after the addition of the following volumes of AgNO3 solution: 15.0 mL, 24.4 mL, 48.8 mL, 49.5 mL and 50.0 mL. Ksp for AgCl is 1.6x10-10.
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