Acid and Bases Flashcards
what is a solution
a perfect mixture of solute and solvent that is homogeneous
define concentration
it refers to the amount of solute that is dissolved in a given volume of solution
define molarity
it refers to the number of moles of solute per litre of solution
what is a Arrhenius acid
its a substance that dissociates in water to produce H+ ions (protons)
what is a Arrhenius base
its a substance that dissociates in water to produce OH- ions (hydroxide ion)
what are the limitations of Arrhenius acid
limited to reactions taking place in water
H+ ions doesn’t exist in water on its own
what are the limitations of Arrhenius base
limited to reactions taking place in water
substances such as NH3 would not be classified as substances
What is a Bronsted-Lowry acid?
proton donor
What is a Bronsted-Lowry base?
proton acceptor
what is neutralization
is formed when a acid donates a proton
What is a conjugate acid?
is formed when a acid donates a proton
What is a conjugate base?
is formed when a acid donates a proton
what is primary standard
donates 1 H+ ex-hydrochloric acid
what is a monobasic (substance/acid/base)
donates 1 H+ ex-hydrochloric acid
what is a dibasic (substance/acid/base)
donates 2 H+ ex-sulfuric acid
whatis a tribasic (substance/acid/base)
donates 3 H+ ex-phosphoric acid
What is a strong acid?
An acid that dissociates fully into ions in an aqueous solution
What is a weak acid?
An acid that only slightly dissociates into ions in an aqueous solution
what are the advantages of Bronsted-lowry’s acid/base
- doesn’t just deal with water, also deals with acid/base reactions
- shows how substances can be amphoteric
- shows the hydronium ion is formed when an acid reacts with water
what is a conjugate acid pair
it is when there are two substances which differ by an H+ or a proton
what is a amphoteric substance
it is a substance that can behave as a acid or base depending on what it reacts with ex-H2O
Self ionisation of water
H20->H++OH-
H-2O+H2O->H3O+ +OH
The concentration of H+ ions and OH-ions ae extremely small
name 3 ways of measuring pH
Universal indicator paper
pH meter
Universal indicator solution
what are the limitations of the pH scale
ranges from 0-14(theoretically there are values outside of this range)
doesn’t work on highly concentrated solutions