13 Jun A volume of 60.0 mL of aqueous potassium
Question
Part A
A volume of 60.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4)What was the molarity of the KOH solution if 22.2 mL of 1.50 M H2SO4 was needed?
is 2KOH(aq)+H2SO4(aq )——>K2SO4(aq)+2H_2O(l)
Express the molar concentration numerically.
Part B
This is Part B to the question
A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 was dissolved if the titration required 14.3mL of the KMnO4 solution?
Express your answer with the appropriate units
Part C
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, boil 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 Cl- concentration using the Mohr method.
First you prepare a solution of silver nitrate, AgNO3, and titrate it against 0.500 g of KCl using the Mohr method. You find that it takes 64.9mL of AgNO3 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 48.0mL of titrant is added.
If the sample of chips used to make the filtrate weighed 82.5g , how much NaCl is present in one serving (145g ) of chips?
Express your answer to three significant figures and include the appropriate units.
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