As a food chemist for a major potato chip company, you are responsible for determining the...

 

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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, bol them in water to extract the salt, and then filter the boiled chips to remove the soggy chip pieces. You then analyze the chip filtrate for CI concentration using the Mohr method.First you prepare a solution of silver nitrate, AgNO,, and titrate it against 0.500 g of KCI using the Mohr method. You tind that it takes 63.0 mL of AgNO, titrant to reach the equivalence point of the reaction. You then use the same silver nitrate solution to analyze the chip filtrate in a Mohr reaction. finding that the solution yields a rusty brown precipitate when 45.7 mL of titrant is added. Part A If the sample of chips used to make the filtrate weighed 92.0 g, how much NaCl is present in ole serving (115 g) of chips? Express your answer to three significant figures and include the appropriate units. > View Available Hint(s) sait/serving = Value Units A volume of 90.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SCO). What was the molarity of the KOH solution if 122 mL of 1.50 M H;SO, was needed? The equation is 2KOH(aq) + H, SO,(aq)-→K2SO, (aq) + 2H,O(1) Express your answer with the appropriate units. > View Available Hint(s) molarity = 0.407 M Sub Previous Answers Correct The solution in the buret (in this case, H2SO4) is called the trant. The sample in the flask (in this case, KOH) is called the analyte. The stage in a titration when the exact volume of solution needed to complete the reaction has been added is called the stoichiometric point or equivalence point. To detect the equivalence point, a few drops of an acid-base indicator are added to the analyte before the titration. Part B Rodox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, HO2. can be titrated against a solution of potassium permanganate, KMNO The folowing equation represents the reaction: 2KMNO, (aq) + H, O, (aq) + 3H, SO. (aq)- 30; (K) + 2MNSO. (aq) + K,SO.(aq) + 4H, 0(1) A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO. What mass of H,O, was dissolved if the titration required 13.3 ml. of the KMNO, solution? Express your answer with the appropriate units. > View Available Hint(s) 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, bol them in water to extract the salt, and then filter the boiled chips to remove the soggy chip pieces. You then analyze the chip filtrate for CI concentration using the Mohr method.First you prepare a solution of silver nitrate, AgNO,, and titrate it against 0.500 g of KCI using the Mohr method. You tind that it takes 63.0 mL of AgNO, titrant to reach the equivalence point of the reaction. You then use the same silver nitrate solution to analyze the chip filtrate in a Mohr reaction. finding that the solution yields a rusty brown precipitate when 45.7 mL of titrant is added. Part A If the sample of chips used to make the filtrate weighed 92.0 g, how much NaCl is present in ole serving (115 g) of chips? Express your answer to three significant figures and include the appropriate units. > View Available Hint(s) sait/serving = Value Units A volume of 90.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SCO). What was the molarity of the KOH solution if 122 mL of 1.50 M H;SO, was needed? The equation is 2KOH(aq) + H, SO,(aq)-→K2SO, (aq) + 2H,O(1) Express your answer with the appropriate units. > View Available Hint(s) molarity = 0.407 M Sub Previous Answers Correct The solution in the buret (in this case, H2SO4) is called the trant. The sample in the flask (in this case, KOH) is called the analyte. The stage in a titration when the exact volume of solution needed to complete the reaction has been added is called the stoichiometric point or equivalence point. To detect the equivalence point, a few drops of an acid-base indicator are added to the analyte before the titration. Part B Rodox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, HO2. can be titrated against a solution of potassium permanganate, KMNO The folowing equation represents the reaction: 2KMNO, (aq) + H, O, (aq) + 3H, SO. (aq)- 30; (K) + 2MNSO. (aq) + K,SO.(aq) + 4H, 0(1) A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO. What mass of H,O, was dissolved if the titration required 13.3 ml. of the KMNO, solution? Express your answer with the appropriate units. > View Available Hint(s)