A student wants to analyze a sample of 0.200 AgNO3 solution?

a. What volume of a 0.150 M HCl solution is needed to precipitate all of the silver

ions from a 15.0 mL of the solution solution?

b. What mass of KCl must be added to precipitate all of the silver ions from a 45.0

mL of the solution?

1 Answer

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  • 1 month ago

    Supposing the missing units on "0.200 AgNO3" to be "M":

    a.

    AgNO3 + HCl → AgCl + HNO3    [balanced as written]

    (0.200 M AgNO3) x (15.0 mL) x (1 mol HCl / 1 mol AgNO3) / (0.150 M HCl) =

    20.0 mL HCl

    b.

    AgNO3 + KCl → AgCl + KNO3    [balanced as written]

    (0.0450 L) x (0.200 mol AgNO3/L) x (1 mol KCl / 1 mol AgNO3) x

    (74.5513 g KCl/mol) = 0.671 g KCl

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