Quale dei seguenti composti può comportarsi da acido di Broensted ? Quale è la relativa reazione con una base? Cl -, HSO 4 -, NH 4 +, NH 3, H 2 S, OH - HSO B = SO BH ; NH B = NH 3 + BH, NH 3 + B = NH BH OH - + B = O -- + BH, H 2 S + B = HS - + BH Quale dei seguenti composti può comportarsi da base di Broensted ? Quale è la relativa reazione con un acido? F -, SO 4 -, HS -, CH 3 NH -, H 2 S, OH - F - + HA = HF + A - ; SO HA = HSO A - ; HS - + AH = H 2 S + A - ; CH 3 NH - + AH = CH 3 NH 2 + A - ; OH - + AH = H 2 O + A - Classificare le specie seguenti come acide, basiche o anfotere:H 2 O ;CH 3 NH 2 ; PO 4 3- ; C 6 H 5 NH 3 + H 2 O anf.; CH 3 NH 2 base ; PO 4 3- base; C 6 H 5 NH 3 + acido

Scrivere gli acidi o le basi coniugate delle seguenti specie: CH 3 NH 2 ; NH 2 NH 2 ; HCO 3 - ; C 6 H 5 OH ; CH 3 COOH ; Identificare le coppie acido-base coniugate nelle seguenti reazioni: HNO 3 + HPO 4 -- = NO H 2 PO 4 - ; HSO NH 4 + = NH 3 + H 2 SO 3 NH 3 + NH 3 = NH NH 4 + CH 3 NH 3 + ; NH 2 NH 3 + ; CO 3 -- ; C 6 H 5 O - ; CH 3 COO - ; HNO 3 acido 1 + HPO 4 – base 2 = NO 3 - base 1 + H 2 PO 4 - acido 2 ; HSO 3 - base 1 + NH 4 + acido 2 = NH 3 base 2 + H 2 SO 3 acido 1 NH 3 base 1 + NH 3 acido 2 = NH 2 - base 2 + NH 4 + acido 1

Addition of a strong acid to a solution of acetic acid at equilibrium: (CH 3 COOH + H 2 O H 3 O + + CH 3 COO - ) would cause the: acetate ion concentration to decrease. acetate ion concentration to increase. hydroxide ion concentration to increase. None of the above is correct. acetate ion concentration to decrease.

The reactions of perchloric acid (HClO 4 ) and acetic acid (HOAc) in water can be written as: HClO 4 + H 2 O H 3 O + + ClO 4 - and CH 3 COOH + H 2 O H 3 O + + CH 3 COO - From these reactions it can be concluded that: acetic acid is a stronger acid than perchloric acid. acetate ion is a weaker base than perchlorate ion. acetate ion is a stronger base than perchlorate ion. water is a very strong acid. none of the above is correct. acetate ion is a stronger base than perchlorate ion.

Consider the following data for the series of hydrogen halide Broensted acids, Acid Ka: HF 7.2 x ; HCl 1 x 10 6 ; HBr 1 x 10 9 ; HI 3 x 10 9 Which of these Bronsted acids would have the weakest conjugate base? HF HCl HBr HI HI (a 1 ) + H 2 O(b 2 ) H 3 O + (b 1 ) + I - (b 1 )

Quale delle seguenti fìgure rappresenta una piccola porzione di un acido debole sciolto in acqua AH + H 2 O = H 3 O + + A - b

In quale ordine di forza crescente si devono disporre i seguenti acidi: II < III < IV < I

In quale ordine di forza crescente si devono disporre le seguenti basi ? II < III < IV < I

NaX NaY NaZ rappresentano soluzioni di Sali sodici di acidi deboli, quale è La corrispondente base coniugata più forte A - + H 2 O HA + OH - ? NaX > NaZ > NaY

exams/ Acids & Bases Choose the correct answer for each question. 17/36 Given this equilibrium reaction, NH 3 + H 2 O = NH OH - According to Bronsted-Lowry theory, which species are considered acids? Both NH 3 and OH - Both NH 3 and NH 4 + Both H 2 O and NH 3 Both H 2 O and OH - Both H 2 O and NH 4 +

Both H 2 O and NH 4 + Correct! In a Bronsted acid-base reaction, a proton (H + ) is transferred from an acid to a base. A Bronsted acid-base reaction will therefore contain two conjugate acid-base pairs. Your score is 100%.