7th grade ch. 3 sec. 3-4 describing acids & bases-acids and bases in solution
Post on 21-Oct-2014
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When we think of acids and bases, we tend to think of chemistry lab acids and bases like
But we are surrounded by acids and bases in the world. Most of them are weak.
Lemons to be sour
Acids cause…
Acids cause…
Cavities in your teeth
acids•Taste sour
•React w/ metals & carbonates-produce H gas
acids•Turn blue litmus paper red
•form hydrogen ions (H+) in water
acids
corrosive•eat away @ other materials
•Taste bitter
•Feel slippery
•Don’t react w/ carbonates
bases
Bases turn red litmus
paper blue.
bbases•form hydroxoxide ions in water
hydroxide ionhydroxide ion•made of oxygen & hydrogen
OHOH--
indicator•compound that changes color when in contact w/ an acid or base
•ex. litmus paper
Properties of Acids and Bases [02:04]
strengths of acids & bases• refers to how well an acid
or base separates into ions in water
pH scale• ranges from 0 – 14
• pH < 7 acid
• pH = 7 neutral
• pH > 7 base pH Scale song
Universal indicator shows how acidic or alkaline a solution is
neutralization• reaction between an acid & base
• produces water & a salt
an ionic compound
Acids and Bases song-Youtube
Acids and Base Alien Juice Bar Interactive Activity
BBC Activity
Ch. 3 Sec. 3-4 Acids & Bases Reviewacid or base?
1. tastes sour
2. forms hydroxide ions in water
3. pH= 8
4. reacts with metals to produce H gas
5. feels slippery
6. turns red litmus paper blue
Ch. 3 Sec. 3-4 Acids & Bases
7. A reaction between an acid and a base is a __ reaction.
8. The pH of a neutral solution is __.9. The products formed when a base
reacts with an acid are __ and __.10. The symbol for a hydrogen ion is __
and the symbol for a hydroxide ion is___.