Acid and Base Definitions. SAVE PAPER AND INK!!! When you print out the notes on PowerPoint, print "Handouts" instead of "Slides" in the print setup. Also, turn off the backgrounds (Tools>Options>Print>UNcheck "Background Printing")!. Acid and Bases. Acid and Bases. Acid and Bases. Acids.
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SAVE PAPER AND INK!!! When you print out the notes on PowerPoint, print "Handouts" instead of "Slides" in the print setup. Also, turn off the backgrounds (Tools>Options>Print>UNcheck "Background Printing")!
Have a sour taste. Vinegar is a solution of acetic acid. Citrus
fruits contain citric acid.
React with certain metals to produce hydrogen gas.
React with carbonates and bicarbonates to produce carbon
Have a bitter taste.
Feel slippery. Many soaps contain bases.
An easy way to remember which goes with which…
“In the cafeteria, you ATEsomethingICky”
NaOH sodium hydroxide lye
KOH potassium hydroxide liquid soap
Ba(OH)2 barium hydroxide stabilizer for plastics
Mg(OH)2 magnesium hydroxide “MOM” Milk of magnesia
Al(OH)3 aluminum hydroxide Maalox (antacid)
Acids – produce H+ ions (or hydronium ions H3O+) in water
Bases – produce OH- ions in water
(problem: some bases don’t have hydroxide ions!)
Arrhenius base is a substance that produces OH- in water
Acids – proton donor
Bases – proton acceptor
A “proton” is really just a hydrogen atom that has lost it’s electron!
A Brønsted-Lowrybaseis a proton acceptor
The Brønsted definition means NH3 is aBASEin water — and water is itself anACID
HCl (g) + H2O (l) H3O+ (aq) + Cl- (aq)
acid base conj. acid conj. base
Definition #3 – Lewis
Lewis acid - a substance that accepts an electron pair
Lewis base - a substance that donates an electron pair
Formation ofhydronium ion is also an excellent example.
3) Classify each of the following substances as either a Lewis acid or a Lewis base: