Acids & Bases Flashcards
How many definitions are there of acids & basis?
3
What is Arrhenius definition of acids?
Releases H+ in solution
What is Arrhenius definition of basis?
Releases OH- in solution
What is the bronsted- Lowry definition of acids?
H+ donor
What is the bronsted- Lowry definition of bases?
H+ acceptor
What is the conjugate acid? (Bronsted-lowry)
What receives the H+
What is the conjugate bases? (Bronsted-lowry)
What has lost the H+ & thus can now receive one
What is the Lewis definition of acid?
Electron pair acceptors (ecectrophices)
What is the Lewis definition of bases?
Electron pair donor (nucleophile)
What is the easiest way to identify which is a Lewis acid & base?
Draw the Lewis structure
What is a strong acid? How can you tell from a reaction equation?
Acid that fully dissociates and are strong electrolytes (conduct electricity better than weak acids), so reaction arrow going one way not both
What is a weak acid? How can you tell from a reaction equation?
Partial dissociated into ions, weak electrolytes ( electrical conductivity depends on extent of ionization), equation arrows are equilibrium arrows
What is a strong base? How can you tell from a reaction equation?
Base that fully dissociates and are strong electrolytes (conduct electricity better than weak bases), so reaction arrow going one way not both
What is a weak base? How can you tell from a reaction equation?
Partial dissociated into ions, weak electrolytes ( electrical conductivity depends on extent of ionization), equation arrows are equilibrium arrows
What is the formula for pH?
Google answer
What is the formula for pOH?
Google answer
At what temperature does pH + pOH= 14?
298 K
pH <7
Acidic
pH > 7
Basic
pH = 7
Neutral
What Color is the universal indicator when pH 1-3?
Red- orange
What Color is the universal indicator when pH 4-6?
Yellow- light green
What Color is the universal indicator when pH 7?
Green
What Color is the universal indicator when pH 8-11?
Blue
What Color is the universal indicator when pH 12-14?
Purple
What happens when you mix an acid & a base?
Acid + base → salt + water
What happens when you mix an acid & a metal?
Acid + metal → salt + hydrogen gas
What happens when you mix an acid & a carbonate?
Acid + carbonate → salt + water + Carbon dioxide
How do you identify acids?
Strong acids
Non-metal oxides: acidic as they form a acid when reacting with water
Carboxylic acids: functional group COOH means weak acid
How do you identify bases ?
Strong bases
Metallic oxides: when reacting with water they become a base
Amino groups: when an NH2 is included
What is an amphoteric compound?
Something that can act as either a base or an acid
How do you identify an amphoteric compound?
Water
Amphoteric oxides: Al2O3
Amino acids
What is Hcl (strong, week, acid, base) & name?
Strong acid, hydrochloricacid
What is HBr (strong, week, acid, base) & name?
Hydrobronicacid, strong acid
What is HI (strong, week, acid, base) & name?
Hyndroiodic acid, strong acid
What is H2so4 (strong, week, acid, base) & name?
Sulfuric acid, strong acid
What is HNO3 (strong, week, acid, base) & name?
Nitre acid, strong acid
What is HclO4 (strong, week, acid, base) & name?
Perchloricacid, strong acid
What is HclO3 (strong, week, acid, base) & name?
Caloric acid, acid
What is kOh (strong, week, acid, base) & name?
Potassium hydroxide, strong base
What is Naoh (strong, week, acid, base) & name?
Sodium hydroxide, strong base
What is ba(OH)2 (strong, week, acid, base) & name?
Barium hydroxide, strong base
What is Csoh (strong, week, acid, base) & name?
Caesium hydroxide, strong base
What is Sr(oh)2 (strong, week, acid, base) & name?
Strontium hydroxide, strong base
What is Ca(oh)2 (strong, week, acid, base) & name?
Calcium hydroxide, strong base
What are alkali?
Bases that are soluable in water
What makes buffers resistant to ph change?
The presence of an equilibrium between a weak acid & its conjugate base