A 2.559 9 pellet containing NaCl and KCl is dissolved in water. A silver nitrate solution is mixed with water containing the
pellet, and a precipitate forms. The precipitate is separated and dried and found to have a mass of 5.112 9. What is the
percent composition of NaCl and KCl in the pellet? (Molar mass of NaCl = 58.44 g/mol, KCL = 74.55 g/mol, AgCl = 143.32 g/mol)
O 14.1% KCl and 85.9% NaCl
O 36.2% KCl and 63.8% NACI
o 50.0% KCl and 50.0% NaCl
63.8% KCl and 36.2% NaCl
85.9% KCl and 14.1% NACI

  1. 👍 0
  2. 👎 2
  3. 👁 1,038
  1. You will need two equations and they are solved simultaneously.
    Let W = grams NaCl in the mixture
    and Z = grams KCl in the mixture
    equation 1 is W + Z = 2.5599 g
    Note: mm stands for molar mass
    The second equation comes from the reaction with AgNO3.
    AgNO3 + KCl = AgCl + KNO3 and
    AgNO3 + NaCl = AgCl + NaNO3
    egn 2 is grams AgCl from the KCl + grams AgCl from the NaCl = 5.1129
    eqn 2 must be modified to be in terms of W and Z like this.
    grams AgCl from KCl in terms of W: (W*mm AgCl/mmKCl)
    grams AgCl from NaCl in terms of Z: (Z*mmAgCl/mmNaCl)
    eqn 2 now is (W*mm AgCl/mmKCl) + (Z*mmAgCl/mmNaCl) = 5.1129
    Solve equation 1 and equation 2 simultaneously to obtain W and Z.
    Convert W and Z to percent of the sample like this.
    % KCl = (W in grams/2.5599)*100 = ?
    % NaCl = (Z in grams/2.5599)*100 = ?
    Post your work if you get stuck.

    1. 👍 0
    2. 👎 1
  2. 1

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.00 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in

  2. Chenistry

    A 0.8870g sample of a mixture of nacl and kcl is dissolved in water and the solution is then treated with an excess of agn03 to yield 1.913g of agcl. Calculate the percentage by mass of nacl in the mixture 1.913g/ 143 = 0.0133 M

  3. Chemistry

    Suppose 26.0g of sodium bromide is dissolved in 150mL of a 0.60M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the

  4. Chemistry

    A sample of a mixture containing only sodium chloride (NaCl) and potassium chloride (KCl) has a total mass of 4.000g. When this sample is dissolved in water and excess silver nitrate is added a white precipitate (AgCl) forms.

  1. chem

    Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.10 of sodium carbonate is mixed with one containing 4.43 of silver nitrate. How many

  2. Chemistry

    Visit: VIRTUAL LAB: Textbook Style Limiting Reagents Problems on Chem collective Windows and Macintosh users: Please use Firefox or Chrome web browser. The simulation will run on most laptops, desktops and touch-enabled devices

  3. Chem

    If a .750g sample of magnesium chloride is dissolved in water and then treated with a silver nitrate solution how many grams of silver chloride should be collected? I don't understand what my first step should be. The balanced

  4. Gen. Chemistry

    A 0.887 g sample of a mixture of NaCl and KCl is dissolved in water and the solution is treated with an excess of AgNO3 producing 1.822 g of AgCl. What is the percent by mass of each component in the mixture?

  1. Chemistry

    Each of the following mixtures is placed in a dialyzing bag and immersed in distilled water. Circle the substances that will be found outside the bag in the distilled water. a. KCl solution and glucose solution b. albumin solution

  2. chemistry

    KCl(s) → K+(aq) + Cl‾ (aq) Solid KCl dissolves as shown in the above equation. A 6.60 g sample of KCl was dissolved in 42.3 g of water. The initial temperature of the water was 21.90°C. After the compound dissolved, the

  3. Chemistry

    When copper wire is placed into a silver nitrate solution, silver crystals and copper(II) nitrate solution form. Write the balanced chemical equation for the reaction. (Type your answer using the format CH4 for CH4.) 1 Cu(s) +

  4. chemistry

    An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. what is the molality of silver nitrate in the solution?

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