1 / 8

Titrations

Titrations. Starter: HCl + NaOH  NaCl +H 2 O H + + OH -  H 2 O What do these reactions show? What conditions are necessary for this to occur?. How can use titrations to work out the concentration of a chemical. Glossary.

aiden
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 Starter: HCl + NaOH NaCl +H2O H+ + OH -  H2O What do these reactions show? What conditions are necessary for this to occur? How can use titrations to work out the concentration of a chemical

  2. Glossary • Titration – a method for measuring the volumes of two solutions that react together. • Alkali – A soluble base with a pH less than 7.

  3. Titrations -strong acid + strong alkali • = neutralise & form a salt -But ONLY if they are in exactly the right quantities. • Otherwise, one (acid or alkali) will be in excess Quick Check: -If there is more acid than alkali to start with in a neutralisation reaction, what will happen? • The final solution will be acidic

  4. Titration • A way to measure volumes precisely • End Point • The point at which the acid and alkali have reacted completely. • This is shown using an indicator.

  5. Concentration = no. of moles volume • Learn this formula triangle! number of moles n concentration (in moldm-3) volume (in dm3) c v

  6. The Method • V:\Science\Teaching resource store\FreezerayChem Simulations\titrations[1].swfhttp://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/crm3s5_5.swf

  7. Calculations Follow the example. Read the instructions and use them to answer the first half of the worksheet.

  8. Reactions that aren’t a 1:1 ratio

More Related