chemistry

Okay so i have this titration question and I don't really know the steps because everyone explains it differently. IF someone could explain me the steps of how i could solve this questions and other like this. Thanks

In three runs of titration 22.8mL, 221.mL, 22.2mL of 0.200 Ba(OH)2 were required to neutralize 10mL of HCl. Calculate the acid concentration

  1. 👍 0
  2. 👎 0
  3. 👁 99
asked by Sherry
  1. Step 1. Write and balance the equation.
    Ba(OH)2 + 2HCl ==> BaCl2 + 2H2O

    Step 2.
    mols Ba(OH)2 = M x L = ? That's approx 0.0046 but you need an accurate answer.

    Step 3.
    Using the coefficients in the balanced equation, convert mols Ba(OH)2 to mols HCl. That's
    approx 0.0046 mols Ba(OH)2 x (2 mols HCl/1 mol Ba(OH)2) = approx 0.0092.

    Step 4.
    M HCl = mols HCl/L HCl = approx 0.0092/0.01 = approx 0.9 M for HCl.

    Notes:
    1. You can make it easier by working in millimoles. In order of above, 22.8 x 0.2 = approx 4.6.
    4.6 x 2 = 9.2. Then M = mollimoles/mL = 9.2/10 = about 0.92M

    2. In practice, you can work this three times (by the way I think that 221 mL must be 22.1 mL), then average the three values you get for the final molarity OR, and this easier, average the three mL [(22.8+22.1+22.2/3)] and use that avg mL.

    Post your work if you have questions on this. These four steps will work any titration problem like this.

    1. 👍 0
    2. 👎 0
  2. Thank you so much! this helped a lot!

    1. 👍 0
    2. 👎 0
    posted by Sherry

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    I don't know how to reply to an answer. First of all thank you! For the question I just asked about the titration curves. Would that mean that titrating with barium hydroxide would take half the volume that is used when titrating

    asked by Niki on March 6, 2012
  2. Algebra again

    I don't understand how to do this problems: Solve for the variable r, C=2PIr (PI is the pi symbol thing then r is next to it) and this problem solve for the variable l, S=B+1/2Pl I know this is the same question, but I somewhat

    asked by Avalon on November 18, 2006
  3. college chemistry

    Stomach acid is composed primarily of HCl. If the concentration of the acid is 0.010M and it has a volume of 75 mL, how many generic tablets would you need to fully neutralize the acid? (Use your data) I just don't know where to

    asked by jamie on November 1, 2016
  4. chemistry

    i'm having a hard time for my chemistry project an my topic on titration and my topic is to determine the mass percentage of iron in steel wool and i can not get as much information on the steps to follows how to create the

    asked by piah on May 17, 2010
  5. Phenolphtalein vs Methyl Orange (check my reasonin

    Why can either phenolphthalein or methyl orange be used for an HCl-NaOH titration, but only phnolphthalein is suitable for an acetic acid-NaOH titration? Sol: for a while,I misunderstood the question and suggested that Phenol. has

    asked by Kizner on June 12, 2006
  6. Physics

    I am reviewing for a test and I don't know how to attempt this question. Could someone please work through this problem and then have the general steps that I need to take to solve the question? Here is the question: A rocket

    asked by Baxter Reus on February 8, 2015
  7. Chemistry--titrations

    What characteristic of phenolphthalein makes it appropriate to use in a HCl/NaOH titration? and is it possible to do a titration without it, and without using another indicator? Why? I really don't get all this because i was gone

    asked by Alexa on May 11, 2010
  8. chemistry/stiochiometry

    for instance Will write a problem. Now, I don't just want the answer, I want to know how to know which substances, and processes in steps and don't spare detail. I am going through high school chemistry. somehow i PAST MY

    asked by "anonymous" on March 16, 2011
  9. Algebra

    I was given an answer to a question but what I really need are the steps to get there as I have other questions I need to answer the same way. Solve the equation w=Cr^-2 for r I was given r=C/w This equation is meant to figure out

    asked by Marysvoice on February 1, 2008
  10. Chemistry

    Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from titration: 13.9 mL Here's

    asked by Rayana on October 10, 2010

More Similar Questions