Honors chemistry unit 11 acids and bases
This presentation is the property of its rightful owner.
Sponsored Links
1 / 9

Honors Chemistry Unit 11 – Acids and Bases PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on
  • Presentation posted in: General

Honors Chemistry Unit 11 – Acids and Bases. Lesson 3 – Properties of Acids and Bases Do Now: Prepare for Quiz 11-2. Over the years, there have been changes to the way an acid or base was defined. Nevertheless, they exhibit the same properties regardless of definition. Properties of Acids

Download Presentation

Honors Chemistry Unit 11 – Acids and Bases

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Honors chemistry unit 11 acids and bases

Honors ChemistryUnit 11 – Acids and Bases

Lesson 3 – Properties of Acids and Bases

Do Now: Prepare for Quiz 11-2.


Properties of acids and bases

Over the years, there have been changes to the way an acid or base was defined. Nevertheless, they exhibit the same properties regardless of definition.

Properties of Acids

Colorless in phenolpthalein (titration lab)

Orange in methyl orange (another indicator)

React with most metals

Taste sour (citric acid in lemon juice)

Turns litmus paper red (Red = Acid)

pH 0-6.99

Properties of Acids and Bases


Properties of acids and bases1

Properties of Bases

Bitter tasting (milk is a weak base)

Pink in phenolpthalein

Yellow in methyl orange

Do not react with metals

Turns litmus paper blue (Blue = Base)

pH 7.01-14

Feel slippery (like soap!)

Properties of Acids and Bases


Properties of acids and bases2

Properties of Both

They both sting wounds & flesh

They are both electrolytes

Both produce salts in reactions

An electrolyte is an ion in solution.

NaCl  Na+(aq) + Cl-(aq)

Any salt dissolved in water is an electrolyte.

Electrolytes improve the flow of electricity in a solution, which your nerves need to transmit electrical signals throughout your body.

http://www.youtube.com/watch?v=uxieMOdo6IU

Properties of Acids and Bases


Acid definitions

Arrhenius Acid/Base – 1900

Svante Arrhenius

An Arrhenius acid is a compound that increases the amount of H+ in solution.

HCl, H2SO4

An Arrhenius base is a compound that increases the amount of OH- in solution.

Ba(OH)2, NaOH

Acid Definitions


Acid definitions1

BrØnsted-Lowry Acid/Base – 1923

J. N. BrØnsted and T.M. Lowry

A BrØnsted-Lowry acid is a proton (H+) donor

HCl, H2SO4, H2O (in some cases)

An BrØnsted-Lowry base is a proton acceptor

NH3 (can become NH4+), H2O can become H3O+

Acid Definitions


Acid base reactions

HCl + NH3  NH4+ + Cl-

This is an example of a Bronsted-Lowry acid/base reaction.

The proton on the acid (HCl) is accepted by the base (NH3)

After the HCl loses the proton, Cl- is now considered a base (because it could possibly receive a proton again) – called a conjugate base

Same with the NH3 accepting the proton – the NH4+ could give the proton away, making NH4+ a conjugate acid.

HCl + NH3  NH4+ + Cl-

Acid Base C.A. C.B.

Acid/Base Reactions


Water

Water, because it is pH neutral, can act as both an acid and a base.

Amphoteric – both an acid and a base

H2O + H2O  H3O+ + OH-

Acid Base C.A. C.B.

This happens all the time – the reason water is neutral is because at all times, there are equal amounts of H3O+ and OH- !!

Water


Homework 11 3 11 16

Homework 11-3: #11-16

  • Tuesday: Begin Titration 2 Lab

  • Wednesday: Titration 2 Lab

  • Thursday: pH, pOH, Quiz 11-3

  • Friday: Formal Report Work (Mr. Cerami @ GlaxoSmithKline)

  • Acid/Base Exam – Tuesday, May 10th


  • Login