Chemistry

posted by .

in this experiment you are you will begin by preparing a dilute soultion of sodium hydroxide by taking 50 ml of 3 M NaOh stock solution and diluting it with 250 ml of water.

i found that and the answer was .5
but how do i do this

b. calculate the number of moles and grams of oxalic acid reqiored to neutralize 35 ml of the dilute NAOh solution you have made abobe.

  • Chemistry -

    First I want to point out a serious error although you may have copied the problem exactly as you received it. But just in case you rephrased it, this will critique that. You do not know the concn of the dilute NaOH BECAUSE you must assume the volumes are additive (the problem states you took 50 mL of the stock solution and diluted it WITH 250 mL of water. This is not the way dilutions are performed. You take 50 mL and add ENOUGH water to make the final volume 250 mL. In the latter case, the concn in the diluted solution is 3 M x (50/250) = 0.60 M. In the former case, you can't calculate the concn unless you know the density of the solution and the final volume.

    For the second part, write and balance the equation. I will call oxalic acid, to make things simple, H2Ox
    H2Ox + 2NaOH ==> Na2Ox + HOH (water)

    How many moles do we have in 35 mL of the dilute NaOH? That is M x L = 0.60 x 0.035 = ??
    Notice from the equation that it takes only 1/2 the moles of HOx to neutralize the NaOH; therefore, take the ?? moles NaOH and divide by 2. Thaat will give you the number of moles of HOx.
    Then grams H2Ox = moles x molar mass.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Hey, I am having a real hard time getting the answers to the problems. Any help would be greatly aprreciated! 1. When 11 mL of a solution containing 2.9 M AlBr3 is diluted to 33 mL, a dilute solution is formed. What is the Br- concentration …
  2. Chemistry

    How can i explain the key features of the periodic table relate to the conclusions after a titration experiment The experiment was the preperation of a standard solution of sodium carbonate and titration for the equation between hydrchloric …
  3. GENERAL CHEMISTRY CALCULATION

    preparing working solution of the disinfectant Osyl from the stock solution requires diluting the stock one part Osyl to five parts water .this is V/V solution .in this situation you have 250ml of water so the question is:HOW MUCH …
  4. chemistry

    a sodium hydroxide solution was prepared according to the procedure outlined in this weeks experiment. This sodium hydroxide solution was standardized by by titration against exactly 10mL of a 0.28M hydrochloric acid solution. In three …
  5. General Chemistry

    "How would you prepare 150. mL of 0.1M sodium hydroxide given a stock solution of 3.0M NaOH?
  6. chemistry

    How many grams of sodium hydroxide (NaOH) are needed to prepare 250 mL of a 0.20 M (mol/dm3) sodium hydroxide solution?
  7. Chemistry

    In chemical analysis, it is often necessary to prepare a solution by diluting a stock solution.Calculate how much of a 5.337M NaOH is needed to make 1.669 liters of a 0.063M sodium hydroxide solution. (Remember to include units.)
  8. CHEMISTRY URGENT

    1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which …
  9. Chemistry

    1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which …
  10. CHEMISTRY

    You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 2. You have a sample which consists …

More Similar Questions