Chemistry

3.13 g of sodium (Na) react with 7.17 g of chlorine (Cl2) to produce 10.3 g of sodium chloride (NaCl).

What is the mass percent of chlorine in sodium chloride?

50.0% is chlorine.
30.3% is chlorine.
69.6% is chlorine.
43.7% is chlorine.

I do not believe it is 30.3 or 43.7, I believe it is 69.6

  1. 👍 0
  2. 👎 0
  3. 👁 313
  1. FIRST MY WAY
    Na = 23 grams / mol
    Cl = 35.5 grams/mol
    so
    NaCl is 23 + 35.5 g/mol = 58.5 g/mol
    so in that mol of Na Cl which weighs 58.5 g
    you have one mol of Cl which weighs 35.5 g
    so
    what is 100 * 35.5 / 58.5 = 60.7 %
    now what they did (silly)
    100 * 7.17/10.3 = 69.6 %

    1. 👍 0
    2. 👎 0
    👨‍🏫
    Damon
  2. Not only is it silly; it is not possible for those numbers.
    Starting with 3.13 g Na you should, at 100% yield, obtain *2*58.5/2*23 = 7.96 g NaCl but they said 10.3. Can't be, that's better than 100% yield. OR,
    starting with 7.17 g Cl2 you would get, at 100% yield, 7.17 x (2*58.5/71) = 11.8 g. Can't be unless the reaction was < 100%. Dead cat on the line somewhere. 60.7% chlorine in NaCl is correct.(71/2*58.5 )100 = 60.68% which rounds to 60.7%. OR,
    The limiting reagent is Na @ 3.13 g. How much Cl2 is needed to react @ 100%. That is 3.13*71/2*23 = 4.83.(obviously there is excess Cl2)
    Total NaCl is g Na + g Cl2 = 3.13 + 4.83 = 7.96. Now the coup de grace is
    %Chlorine = (g chlorine/g NaCl total)100 = 100 x 4.83/7.95 = 60.68 or 60.7%. Voila!

    1. 👍 0
    2. 👎 0
    👨‍🏫
    DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After

  2. chemistry

    Hydrogen and chlorine react to yield hydrogen chloride: H2+ Cl2 ( 2HCl. How many grams of HCl are formed from reaction of 3.56 g of H2 with 8.94 g of Cl2? Which reactant is limiting?

  3. Chemistry

    Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an

  4. Chemistry Balancing Equations

    Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with

  1. Chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is

  2. Chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is

  3. Chem

    Which of the following pairs of elements are likely to form an ionic compound? lithium and chlorine sodium and potassium phosphorus and chlorine sodium and nitrogen argon and potassium

  4. Chemistry

    Consider the following reaction: 2NaCl(aq) + H2O(l) -> Cl2(g) + H2(g) + 2NaOH(aq) A 10.0g sample of sodium chloride was placed in 10.0 g of water. If 3.85 g of Cl2 was obtained, what was the percent yield of Cl2?

  1. Chemistry

    Bromine and chlorine gas react to give bromine monochloride (BrCl) according to Br2(g)+Cl2(g)⇌2BrCl(g) Given initial concentrations [Br2]=1.50 mol L-1, [Cl2]=0.90 mol L-1 and [BrCl]=0 and K=7 determine (to two decimal places)

  2. Chemistry

    Write balanced equations for the formation of [Ni(NH3)6][BF4]2 starting from an anhydrous sample of nickel(II) choride hexahydrate. (3 equations necessary) I am slightly confused by this. I think the starting sample has the

  3. chemistry

    Sodium (Na) metal undergoes a chemical reaction with chlorine (Cl) gas to yield sodium Cl, or common table salt. If 1.00 g of sodium reacts with 1.54 g of chlorine, 2.54 g of sodium chloride is formed and 17.9 kJ of heat is

  4. Chem 400

    Direct reaction of solid iodine (I2) and gaseous chlorine (Cl2) produces an iodine chloride,(IxCly), a bright yellow solid. 0.678 g of iodine (I2) is mixed with 0.851 g of chlorine (Cl2). After the elements react, some chlorine is

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