Question

#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions?

a. NaF b. RbCl c. Sn(NO3) d. MgS e. CrI3

#1 B) Acid/base strength

a. Put these in order of increasing basicity

CO3-2, I-, NH2-, HSO4-, OH-, NO3-

b. Put these in order of increasing acidity

HI, NH3, HCO3-, HF, H2O, HClO4

Answer 1

#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions?

a. NaF b. RbCl c. Sn(NO3) d. MgS e. CrI3

Solution :- The salts made of strong acid and strong base are neutral.

Salts formed by weak acid and strong base are basic

Salts made by weak base strong acid are acidic

NaF= Basic

RbCl = Neutral

Sn(NO3)= acidic

MgS = Basic

CrI3 = Neutral

#1 B) Acid/base strength

a. Put these in order of increasing basicity

CO3-2, I-, NH2-, HSO4-, OH-, NO3-

Solution :- Conjugate base of weak acid is stronger base and the conjugate acid or weak base is stronger than acid

Order is as follows

HSO4^- <NO3^- <CO3^2- <OH^- <NH2^-

b. Put these in order of increasing acidity

HI, NH3, HCO3-, HF, H2O, HClO4

Solution :- Acid strength increases when the stability of the conjugate base increases therefore the order of the increasing acidity is as follows

NH3 < H2O < HCO3^-<HF < HI < HClO4