VA 502215 Assignment 13 h x What a Jones reducto x C Search Textbook Solutio x i

Question

VA 502215 Assignment 13 h x What a Jones reducto x C Search Textbook Solutio x is C vwww.webassign.net/web/Student/Assignment Responses last?dep 4204284 My Notes Ask Yo Some people have an allergic reaction to the food preservative sulfite (S Sulfite In wine was measured by the following procedure: To 50.0 ml of wine were added 5.00 ml of solution containing o.8043 g 1.0 mL of 6.0 M SO4 quantitatively converted IO3 into Ir reacted with so32- to generate so. 12-, leaving excess ls 5 g KI)/100 m Acidifici h The ution. The excess ed eq 2.86 mi of 0.01818 M Na2s203 to reach a starch end point. (a) write the reaction that occurs between Kloz and KI when the H?so4 ls added. se the lowest possible coefficients. Onit spectator ions and states-of-matter.) chem (b) Wrile a balanced reaution belween 13 and s Use e lowesu possible coellicienus. O specuduor ions and suales-of mauler.) Help chem Pad Greek (c) Find the concentration of sulfite in the vine. Fxpress your answer in molil and in mg 50 per liter. mnl i HINTS: Don't use scientific notation, d put 7ero before decimal point, carefully evaluate significant figures. mg/L

Explanation / Answer

a) Potassium iodate () reacts with potassium iodide () in presence of suphuric acid () to yield triiodide () as follows:

-----(1)

b) The reaction between and is as follows:

-----(2)

c) Given volume of wine =50 mL

Given volume of solution = 5 mL

Given volume of = 1 mL

Total volume of solution = 50 + 5 + 1 = 56 mL

Basis: 1000 mL of solution

Concentration of in 5 mL of solution =

Concentration of KI in 5 mL of solution =

According to equation 1 mole of reacted to form 3 moles of

Hence moles of produced = = mol/litre

Moles of added =

The reaction between and proceeds as follows:

1 mole of requires 2 moles of . So moles of react with moles of

So excess after reaction 2 is moles/litre

So reacted in reaction 2 =

Hence according to reaction 2 present == mg/litre

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