chem

20ml sample of .200M HBr is titrated w/ .200M NaOH. what is the ph after adding 15ml (base)?

  1. 👍 0
  2. 👎 0
  3. 👁 106
asked by ami
  1. HBr + NaOH ==> NaBr + HOH

    Calculate mols HBr.
    mols HBr = M x L = ??
    Calculate mols NaOH used = M x L.

    Subtract mols of one from mol of the other. The one in excess will give you the H^+ if it is HBr or OH^- if it is NaOH.
    Then pH = -log(H^+) OR
    pOH = -log(OH^-)

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    A 50.00ml sample of 0.200M hydroflouric acid (HF) is titrated with 0.200M NaOH. The Pka of HF is 3.452. a) calculate the pH of the HF solution before titration b) calculate the pH after the addition of 20.00ml of NaOH

    asked by michelle on November 6, 2010
  2. Chemistry

    50.0mL of 0.200M HCl diluted to 100.0 mL and titrated with 0.200M NaOH. what is total volume of solution(L) if volume of NaOH added(mL) are 0.00, 5.00, and 10.0

    asked by Anonymous on March 25, 2011
  3. Chemistry

    Okay, so here's the question: A 60.0 mL sample of 0.100M CH3COOH is titrated with 0.200M? What is the pH at each of the following points... After 30.0 mL of NaOH: This part...I'm getting confused on. I keep getting a number close

    asked by Anonymous on October 19, 2011
  4. Ap chemistry

    A 20mL sample of .200M potassium dichromate solution is added to 30 ml of .4M silver nitrate. What is the balnced molecular equation?

    asked by Sarah McKee on November 29, 2010
  5. CHEM

    IF A 50.0 ML SAMPLE OF CALCIUM HYDROXIDE IS TITRATED WITH 25.0 ML OF 0.200M PHOSPHORIC ACID, WHAT IS THE MOLARITY OF THE BASE?

    asked by SHANNA on May 7, 2013
  6. Chemistry

    A 38.5 mL sample of HBr is titrated with 112 mL of 1.05 mol/L KOH. The density of the HBr solution is 1.75 g/mL. Calculate the percentage by mass of the HBr in the sample. How come we don't use density*volume to find the moles of

    asked by Sam on December 2, 2015
  7. Chemistry

    A 20.0-mL sample of 0.300 M HBr is titrated with 0.150 M NaOH. What is the pH of the solution after 40.3 mL of NaOH have been added to the acid?

    asked by Jason on March 5, 2015
  8. chemistry

    A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________.

    asked by katie on July 24, 2012
  9. chemistry

    A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________. A. 0.413 B. 0.386 C. 0.163 D. 0.579 E. 0.237

    asked by katie on July 24, 2012
  10. Chemistry

    Use the Henderson Hasselbalch equations to solve for the Ka of the acid. Solution [HX]=0.200M and [NaX]=0.200M. They both have a pH of 4.11.

    asked by Martha on March 30, 2017

More Similar Questions