Chemistry II

A stock solution containing manganese ions was prepared by dissolving 1.542 g pure manganese metal in nitric acid and diluting to a final volume of 1.000L. Calculate the concentration of the stock solution.

mols Mn = g/atomic mass Mn.
M = mols/L

1.542 g / 54.9 amu Mn = .028 mols Mn
0.28 mols Mn / 1.000 L = .028

1.542 g / 54.9 amu Mn = .028 mols Mn
0.28 mols Mn / 1.000 L = .028 M

Two errors.
1. The mass given is to four significant figures so you should use at least 4 for the atomic mass of Mn.
2.Check your arithmetic. 0.28/1.000 does not equal 0.028.


I see the problem with the math. You have 0.028 but you miscopied it as 0.28 on the next line. You should have four places in the answer, also.

  1. 👍 0
  2. 👎 0
  3. 👁 186
asked by Jayd

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    A stock solution containing Mn2+ ions was prepared by dissolving 1.168 g pure manganese metal in nitric acid and diluting to a final volume of 1.000 L. Calculate the concentration of the stock solution.

    asked by rachel on August 9, 2012
  2. Chemistry

    Can someone help me with these two questions? Thank you! a.) Describe (give instructions) how you would prepare 7.00 L of 0.750 M K2CrO4 from a 2.25 M K2Cro4 stock solution b.) A stock solution containing Ba2+ ions was prepared by

    asked by Anonymous on June 11, 2015
  3. Chem

    Potable water (drinking water) should not have manganese concentrations in excess of 0.05 mg/mL. If the manganese concentration is greater than 0.1 mg/mL, it imparts a foul taste to the water and discolors laundry and porcelain

    asked by jason on April 18, 2015
  4. science

    A 2.747-g sample of manganese metal is reacted with excess HCl gas to produce 3.22 L of H2 at 373 K and 0.951 atm and manganese chloride compound (MnClx) what is the formula of manganese chloride compond produced in the reaction?

    asked by heather on December 9, 2007
  5. chem

    a 2.747g sample of manganese metal is reacted with excess HCl gas to produce 3.24L of H2 at 366K and .927atm and a manganese chloride compound(MnCl0. What is the formula of the manganese chloride compound produced in the reaction?

    asked by mel on November 16, 2007
  6. chemistry

    What is the chemical equation for the reaction of manganese metal with sulfuric acid to produce aqueous manganese (II) sulfate and hydrogen gas

    asked by Anonymous on February 24, 2011
  7. Redox Reaction

    In an acidic solution, manganese(II) ion is oxidized to permanganate ion by bismuthate ion, BiO3-. In the reaction, BiO3- is reduced to Bi3+. How many milligrams of NaBiO3 are needed to oxidize the manganese in 30.2 mg of

    asked by Kelly on April 19, 2015
  8. Chem

    Manganese dioxide reacts with bromide ions to form manganese ions and bromate ions in an acidic aqueous solution. Write the balanced equation for this reaction. 1)Br- + MnO2 + 3H2O --> Mn2+ + BrO3- + 2H3O+ 2)Br- + 3MnO2 + 6H3O+

    asked by Rob on December 12, 2007
  9. Chemistry PLEASE HELP!

    Manganese dioxide reacts with bromide ions to form manganese ions and bromate ions in an acidic aqueous solution. Write the balanced equation for this reaction. Select one: a. Br- + MnO2 + 3H2O Mn2+ + BrO3- + 2H3O+ b. Br- + 3MnO2

    asked by Sophie on May 3, 2013
  10. chemistry

    A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.0 mL sample of this stock solution is added to50.0 mL of water. Calculate the concentration of ammonium ions

    asked by Anonymous on March 1, 2011

More Similar Questions