1. Ascorbic acid (Vitamin C) reacts with 13 using starch as the indicator. The endpoint is marked by the appearance of a deep blue starch iodine complex when the first fraction of a drop of unreacted 13 remains in the solution. A) If 29.41 mL of 13 solution is required to react with 0.1970 g of pure ascorbic acid, what is the molarity of the 13- solution? B) A Vitamin C tablet containing ascorbic acid plus an inert binder was ground to a powder and 0.4242 g was titrated by 31.63 mL of 13. Find the weight percent of ascorbic acid in the tablet.

How do we solve this with dimensional analysis?

POSTLABORATORY ASSIGNMENT 1. An oleic acid, C17H33COOH (282 g/mol), solution is added to water in a watchglass until a monolayer forms. Assume that there are no spaces between molecules in the monolayer and that each oleic acid molecule occupies an area of 0.25 nm². If the concentration of the oleic acid solution is 0.00012 g/mL, what is the experimental value of Avogadro's number? dropper pipet calibration number of drops of oleic acid in the monolayer diameter of monolayer OMA 30+20 od os pulgad Im od of ingranit yd souls mesto bonstantial = || || || 00.1 arestusslom (0) N = = = Jorna ode 65 drops/mL 16 drops 14.5 cm dirua orli unalools) mano lo zemoristalls d A(otho) wall

A sample of potassium bicarbonate (KHCO3) was reacted with HCl to produce KCl. The following data was collected. Mass of beaker 28.43 g Mass of beaker + KHCO3 36.95 g Volume of HCl 12.0 mL Concentration of HCl 9.0 M Mass of beaker +residue (KCl) 33.82 g Calculate the following quantities. Show calculations where requested: Mass of KHCO3 __________________ Mass of residue __________________ Mass of 1 mol of KHCO3 __________________ No. of moles of KHCO3 used ___________________ Show calculations below No. of moles of HCl added ____________________ Show calculations below: Assuming KHCO3 is the limiting reactant, how many grams of KCl can be formed? Show calculations below: Assuming HCl is the limiting reactant, how many grams of KCl can be formed? Show calculations below: Which reactant is limiting? ___________________ Which reactant is excess? ____________________ Actual yield of KCl: ______________________ Theoretical yield of KCl: ______________________ Percent yield of KCl:…