1 / 9

The pH Scale

The pH Scale. Acids. Practical preperation Record into your book. Acids. Try the practical again, but this time instead of using drops of liquid we will use a small piece of paper This time you do not need to record anything but the method is a little different

chelsa
Télécharger la présentation

The pH Scale

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. The pH Scale

  2. Acids • Practical preperation • Record into your book

  3. Acids • Try the practical again, but this time instead of using drops of liquid we will use a small piece of paper • This time you do not need to record anything but the method is a little different • Take a small piece of indicator paper and put 1 or 2 small drops of a single solution on it. Observe the colour. • When you are finished try another solution. Try to keep a sample of all the solutions that you try

  4. Acids and Bases • Acids and bases are one way of classifying solutions • Using “Universal Indicator” we are able to compare different solutions as they will give different colour results • Classifying how acidic or basic a solution is can be done using the pH scale

  5. The pH Scale • The pH scale indicates the number of Hydrogen ions in a solution and goes from 0 to 14 • ACIDS have a pH from 0 to 7 • BASES have a pH from 7 to 14 • If something has a pH of 7 it is NEUTRAL

  6. Do Now • Complete the following formulae: • Na+ + Cl- • K+ + Cl-  • Cl- + H+  • K+ + OH-  • Be careful with these ones! • Mg2+ + Cl-  • NH4+ + OH-  • Ca2+ + OH- 

  7. Do Now • Complete the following formulae: • Na+ + Cl- NaCl • K+ + Cl-  KCl • Cl- + H+  HCl • K+ + OH-  KOH • Mg2+ + Cl-  MgCl2 • NH4+ + OH-  NH4OH • Ca2+ + OH-  CaOH2

  8. Do Now • Complete the following formulae: • Mg2+ + O2-  • Ca2+ + Cl-  • NH4+ + O2- 

  9. Balancing equations • When we have situations like Mg2+ + Cl-  MgCl2 And we look at the number of each type of atom on each side of the arrow they are not the same. When we have a situation like this we must add numbers in front of the ions or elements in order to “balance” the equation Mg2+ + 2Cl-  MgCl2

More Related