UTT Module 3 Flashcards
The acidity of an aqueous solution depends on
the concentration of H+ ions or OH- (hydroxyl) ions in the solution
Acid definition
a substance which yields H+ ions when dissolved in water
pH formula
-log10 (H+)
where h is the moles of H
H is actually the H plus ion concentration
who is the proton donor
acid
who is the proton acceptor
base
base definition
a substance that yields oh- ions when dissolved in water
Properties of Acids
Taste sour
Turn blue litmus paper red
Neutralizes bases
Properties of Bases
Taste bitter
Feels soapy or slick
Turn red litmus paper blue
Neutralizes acids
What is a neutralisation reaction
A reaction better an acid and base that forms slat in water
What does pH stand for
Potential of Hydrogen
Rate Law
Rate of reaction = amount of reactants used or the amount of profusct formed/time taken
Define rate of reaction
The speed at which a chemical reaction happens
How can the reaction be measured
The rate at which the reactant is used up
Or
The rate at which the product is formed
The rate of a reaction will increase if
The temp increases
If a catalyst is used
The pressure of the reacting gas is increased.
The concentration of a dissolved reactant is increased
Solid reactants are broken into smaller pieces
In a closed system, reactants never
Proceed until completion
Therefore all reactants do not turn into product
What is a state of equilibrium
Wherein both reactants and product are present at constant concentrations
Generic Reaction expression
aA+bB arrow cC + dD
equilibrium expression
K= C^c D^d / Aª B^b
Where a, b, c, d are the coefficients
C D are the product
A B are the reactants
K is the equilibrium coefficient
pOH + pH =
14
14=
pOH+ pH
pOH=
-log[OHminus]
You use the equilibrium on what states of matter
Gas
Aqueous solution
Before using the equilibria expressions you must
Balance the equation
