CHEM UNIT 13

which expression represents the pH of a solution

-log[H3O+]

calculate the molarity of a Ba(OH)2 solution if 1900 mL is completely titrated by 261 mL of .505 M HNO3

.0254 M

in a neutral solution, the [H+] is _____

1 x 10-14

which of the following is NOT a strong acid HNO3 CH3COOH H2SO4 HCl

CH3COOh

what is a bronstead lowry acid

a proton donor

in water, hydroxides of group 2 metals

ar all strong bases

in an acid base titration, equivilent quantities of hydronium ions and hydroxide ions are present

at the end point

what type of acid is sulfuric acid

diprotic

in a neutral solution, the [H] is __-

equal to [OH]

a substance with a large Ka would be considered

strong acid

what is the ph of a solution with a concentration of 0.01 M HCl

2

in the reaction HClO3 + NH3 = NH4+ + ClO3- the conjugate base of HClO3 is

ClO3-

which of the following represents a bronstead-lowry conjugate base pair SO and SO CO and CO HO and H NH and NH

Nh and NH

what is transferred between a conjugate acid base pair

a proton

what is transferred between a conjugate acid-base pair

a proton

a lewis base is an

electron-pair donor

with solutions of strong acids and strong bases, the word strong refers to ____

ionization

if [H3O+] of a solution is greater than [OH], the solution ______

is always acidic

what are properties of an acid

pH less than 7 sour taste [H+] > [OH-]

in a titration, when the number of moles of hydrogen ions equals the number of models of hydroxide ions, what is said to have happened

the equivalence point has been reached

indicators are classified into three types according to

the ph at which they change color

what type of acid is phosphoric acid

triprotic - GOES OFF OF HYDROGEN

which compound can act as both a bronstead lowry acid and a bronstead lowry base

water

pure water contains what

water molecules, H, OH

a .12 M solution of an acid that ionizes only SLIGHTLY in solution would be termed _______

weak

during an acid base titration, a very rapid change in pH occurs when

when the amounts of H3O and OH are nearly equivalent

a base is weak if its tendency to ____

attract a proton is slight

in the reaction H3PO4 + H2O = H3O + H2PO4- the ion H2PO4- acts as a

base

which type of solution is one with a pH of 8

basic

which type of solution si one with a pH of 8

basic

what is the basic assumption in the arrhenius theory

because acids and bases conduct electric current, they must produce ions in solution

what are properties of a base

bitter slippery feel [H+] < [OH-]

which indicator is used to study neutralizations of strong acids with strong bases

bromthymol blue

whose definition of acids and bases emphasizes the role of protons

bronstead and lowry

what theory of acids and bases do conjugate acids and bases belong to

bronstead lowry

the reaction HCl + KOH = KCl + H2O is a

bronstead lowry acid-base reaction

in the reaction CO + HO = HCO + OH, the carbonate ion is acting as a ______

bronstead lowry base

with solutions of strong acids and strong bases, the word strong refers to

degree of ionization

during a titration, the indicator changing color indicated that the ____ has been reached

end point

what distinguishes the equivalence point from the end point

equal moles of acid and base vs color change of indicator

the acid dissociation constant for an acid dissolved in water is equal to the ______

equilibtium constant times the concentration of water

the pH of a basic solution is what

greater than 7

a conjugate acid is the species that

is formed by the addition of a proton to a base

what is the transition interval for litmus

pH 5.5-8.0

the K of carbonic acid is 4.3 x 10 HCO = H + HCo this means that HCO is a ____

poor hydrogen ion donor

a conjugate base is the species that

remains after an acid has given up a proton

when an acid reacts with a base, what compounds are produced

salt and water

pure water partially breaks down into charged particles in a process called what

self-ionization

which of the following bases is strong sodium hydroxide magnesium hydroxide ammonia vinegar

sodium hydroxide

what is true about arrhenius bases

some are ionic hydroxides they dissociate in solution to release hydrogen ions into the solution some react with water and remove a hydrogen ion, leaving hydroxide ions

in the equation CH3COOH + H2O = H3O + CH3COOH H2O is a weak base and H3O is a

strong acid

which acid is used in batteries

sulfuric acid

what is true about arrhenius bases

their water solutions are called aqueous acids they are molecular compounds with ionizible hydrogen atoms their pure aqueous solutions are electrolytes

the process of adding a known amount of solution of known concentration to determine the concentration of another solution is called _____

titration

if [OH1-] = 1 x 10-4 M, what is the pH of the solution

10

what is the concentration of OH- in a solution

10-14 x [H3O+]

the pH of solution is 9. what is its H30 concentration

10-9 M

if the hydroxide-ion concentration is 1 x 10-12 M, what is the pH of the solution

2

what is the hydrogen-ion concentration if the pH is 3.7

2 x 10-4

what is the hydroxide ion concentration of a solution whose pH is 12.40

2.5 x 10-2 M

what is the pH of a 10-4 M HCl solution

4

what is the pH of a neutral solution at 25 C

7

the formula of the hydrogen ion is often written as _____

H

what are the acids in the following: CN1- + H2O = HCN + OH1-

H2O and HCN

the substance produced when KOH neutralized HCl are what

H2O and KCl

strong acids

HCl, HBr, HI, HNO3, H2So4, HClO4

which of the following reactions illustrate amphiprotism HO + HO = HO + HO NaCl = Na + OH HCl + HO = HO + C NaOH = Na + OH

HO + HO = HO + HO

the acid dissociation constant (Ka) for an acid dissolved in water is equal to the ____ x______-

[H+][OH-] [H3O][OH-]

which of these solutions is the most basic

[H] = 1 x 10M

what is an acid according to arrhenius

a substance that releases H+ when placed in water

A lewis acid is a substance that can ____

accept a hydrogen ion

a lewis acid is a substance that can _____

accept an electron pair

which of the following is a weak base acetate ion hydroxide ion hydronium ion hydrogen ion

acetate ion

which of the following pairs consists of a weak acid and strong base sulfuric acid, sodium hydroxide acetic acid, ammonia acetic acid, sodium hydroxide nitric acid, calcium hydroxide

acetic acid, sodium hydroxide

which of the following represents a bronstead lowry conjugate acid base pair so32- and SO2 NH41+ and NH3 CO and COOH HCl and NaCl

NH41+ and NH3

what is an arrhenius base

INCREASE OH CONCENTRATIOn

which of these is an arrhenius base CH3COOH LiOH NH3 HCl

LiOH (OH)

in the reaction HClO3 + NH3 = NH4+ + ClO3- the conjugate acid of NH3 is

NH4