16A Flashcards
Electrolyte
A substance that releases ions and conducts electricity when it dissolves in water
Base properties
- bitter taste
- slippery
- reacts with Litmus paper (blue)
Neutralization reaction
An acid and a base neutralizing each other in an aqueous solution to produce water and a salt
Arrhenius acid
Release H+
Arrhenius base
Release OH-
Brønsted lowry acid
Donates protons (H+)
Brønsted lowry base
Accepts protons (H+)
Lewis acid
Accepts electron pairs
Lewis base
Donates electron pairs
Deprotonation
Donate proton
Protonation
Accept proton
Conjugate base
Structure formed when an acid is deprotonated
Conjugate acid
Structure formed when base is protonated
pH stands for..
Power of hydronium ion
pH 7
Neutral
pH under 7
Acid
pH over 7
Base
Strong acids lose their ? easily and completely
H+
Strong bases lose their ? Easily and completely
OH-
Weak acids and bases …
Do NOT ionize completely
If an acid is weak, the conj base must be?
Strong
What causes acid-base strength?
Electrical in nature
What determines how easily protons can be accepted or given?
The location and arrangement of e-
Amphoteric substance
Substance that can be either an acid or a base depending on conditions
Monoprotic
Can give 1 H+
Diprotic
Can give 2H+
Triprotic
Give 3 H+
Indicators
- change color when pH changes
- give rough estimates of pH
- not as exact as pH meter
Universal indicator
A combination of indicators used to show a wide range of color over the 0-14 pH scale
Transition interval
A range of pH values over which the color change occurs
Titrations
Determining the unknown concentration of a solution by measuring its capacity to react with a solution of known concentration
Titration curve
A graph which shows the pH change with the addition of an acid to a base or base to acid
Equivalence point
The point at which there are equal amounts of acid and base (pH=7)
End point
The point at which a titration is stopped once the indicator changes color
Buffers
Solutions that resist pH changes
Acid properties (3)
- sour taste
- reacts with litmus paper (red)
- reacts with active metals