Ap Chemistry

a mixture contains only sodium chloride and potassium chloride. a .1586-g sample of the mixture was dissolved in water. it took 22.90 mL of 0.1000 M AgNO3 to completely precipitate all the chloride present. what is the composition(by Mass percent) of the mixture?

  1. 👍 0
  2. 👎 0
  3. 👁 1,300
  1. Two equations and two unknowns. Solve simultaneously.

    eqn 1.
    g NaCl + g KCl = 0.1586g

    eqn 2.
    mol AgCl from NaCl + mol AgCl from KCl = mol AgCl total

    Now put those into math form.
    Let X = g NaCl
    and Y = g KCl
    MM stands for molar mass.
    ---------------------
    eqn 1.
    X + Y = 0.1586 g

    eqn 2.
    (X/MM NaCl) + (Y/MM KCl) = 0.02290*0.1000

    Find X and Y, then
    %NaCl = (X/0.1586)*100 = ?
    Post your work if you get stuck.
    ^KCl = (Y/0.1586)*100 = ?

    1. 👍 0
    2. 👎 0
  2. 35

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A 0.8870-g mixture of sodium chloride and potassium chloride is dissolved in water and silver nitrate is added. The AgCl that precipitates has a mass of 1.913 g. Calculate the percent by mass of potassium in the initial mixture。

  2. Chemistry

    If the density of ocean water at a depth of 1.00 x 104 m is 1.071 g/mL and if 20.0 g of water at that depth contains 197mg of potassium chloride, what is the molarity of potassium chloride in the sample? It wants it in M.

  3. chemistry

    The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a

  4. chemistry

    A 2.118 g sample of a solid mixture containing only potassium carbonate ( MM=138.2058 g/mol ) and potassium bicarbonate ( MM=100.1154 g/mol ) is dissolved in distilled water. A volume of 30.20 mL of a 0.763 M HCl standard solution

  1. chemistry

    Ravi prepared a solution of sodium chloride by mixing 5.85g of salt in 1 liter of water. a)find molar mass of sodium chloride b)find number of moles of sodium chloride dissolved.

  2. Chemistry

    How many grams of a solid mixture containing strontium chloride would one need to make 558 mL of a 0.100 M strontium chloride solution, if the solid mixture contains 58.6% strontium chloride by weight

  3. chem 11

    if we mix 25 g of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be? NaBr+KCL->NaCl+KBr how do you calculate theoretical yield?

  4. science

    Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride.After dissolving this mixture in water,0.500M silver nitrate is added dropwise until precipitate formation is complete. THe mass of the white precipitate formed

  1. Chemistry

    A 10.00 gram solid sample consisting of a mixture of sodium chloride and potassium sulfate is dissolved in 100.0 mL of water is combined with another 200.0 mL solution that contains excess aqueous lead(II) nitrate. Upon mixing the

  2. chemistry

    3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask. 25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of K2CO3 in the

  3. chemistry

    What is the number of unpaired electrons for the following compounds: Cobalt (II) chloride Copper (II) chloride Iron (II) chloride Manganese (II) chloride Nickel (II) chloride Zinc chloride I don't know how to do this

  4. chemistry

    35.8g of a mixture of potassium chloride and potassium trioxochlorate(v), we're heated to a constant mass. If the residue weighs 24.9g.what was the percentage mass of the potassium chloride in the mixture (k=39, cl=35.5, o=16)

You can view more similar questions or ask a new question.