1 / 7

Titrations

Titrations. Titrations. Titration : adding a known amount of solution of known concentration to a solution with an unknown concentration Goal: To determine the unknown concentration. Titrations. Endpoint : the point of neutralization in a titration.

alicia
Télécharger la présentation

Titrations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Titrations

  2. Titrations Titration: adding a known amount of solution of known concentration to a solution with an unknown concentration Goal: To determine the unknown concentration

  3. Titrations Endpoint: the point of neutralization in a titration How do we know we reached the endpoint in a titration? We can use an indicator and look for a color change! http://www.youtube.com/watch?v=g8jdCWC10vQ

  4. Titration Example A 2.5 L solution of H2SO4 is completely neutralized by 0.5 L of 1.0 M NaOH. What is the concentration of the H2SO4 solution? In buret: 1.0 M NaOH In Erlenmeyer flask: ? M H2SO4

  5. 0.5 L NaOH x 1 mol NaOH 1 L NaOH Titration Example A 2.5 L solution of H2SO4 is completely neutralized by 0.5 L of 1.0 M NaOH. What is the concentration of the H2SO4 solution? 1. Write the balanced neutralization reaction H2SO4 + 2 NaOH  Na2SO4 + 2 H2O 2. Start with your known value 0.5 L of 1.0 M NaOH 3. Find the moles of your known using the volume and concentration = 0.50 mol NaOH

  6. 0.50 mol NaOH x 1 mol H2SO4 2 mol NaOH 0.25 mol H2SO4 2.5 L H2SO4 Titration Example continued A 2.5 L solution of H2SO4 is completely neutralized by 0.5 L of 1.0 M NaOH. What is the concentration of the H2SO4 solution? H2SO4 + 2 NaOH  Na2SO4 + 2 H2O 4. Use the molar ratio (the coefficients) to determine the unknown number of moles = 0.25 mol H2SO4 5. Divide the moles by the volume to get concentration = 0.1 M H2SO4

  7. Titration Practice A 1.5 L solution of HCl is completely neutralized by 2.0 L of 0.5 M Al(OH)3. What is the concentration of the HCl solution? Show your work for each step: 1. Write the balanced neutralization reaction 2. Start with your known value 3. Find the moles of your known using the volume and concentration 4. Use the molar ratio (the coefficients) to determine the unknown number of moles 5. Divide the moles by the volume to get concentration

More Related