Acids & BasesChapter 19—Glencoe

Observe demo

Be cognizant of the following vocabulary words..› Acid› Base› Indicator› Phenolphthalein› Hydronium ion› Hydroxide ion› Neutralization› Precipitate

Check out those words again!

This time, re-write your observations correctly using those vocabulary words to describe the “demo”.

You might start with definitions from the book, first. (hint, hint)

characteris

tics

Acid

sB

ase

s

Sour Corrosive Low pH High pOH

Bitter Caustic Slippery feel on skin High pH Low pOH

History of the acid…

….not THAT acid!..I mean the classification of certain molecules with certain properties!

Arrhenius—molecules that produce hydronium ions when in solution

Bronsted—molecules that release protons Lewis—molecules that accept electrons in

solution

The opposite is true for bases!

Arrhenius—molecules that produce hydroxide ions in solution

Bronsted—molecules that accept protons

Lewis—molecules that donate electrons

What?...how about examples!

HCl Ba(OH)2

NaOH H2SO4

NH3

Hydrochloric acid Barium hydroxide Sodium hydroxide Sulfuric acid Ammonia—a base!!

Strong vs. concentrated

3 strong acids—memorize them› Hydrochloric acid› Sulfuric acid› Nitric acid

“Concentrated” simply refers to how much water has been added to dilute the solution!

WATCH OUT!..for strong & concentrated!