1. Arrange each group of compounds/ions in order of increasing pH and please exp

ID: 1040145 • Letter: 1

Question

1. Arrange each group of compounds/ions in order of increasing pH and please explain I will rate.

a) (3 pts) Li2CO3 OH- NH4Br NaCl

b) (3 pts) CH4 HBr H2O F-

c) (3 pts) HBrO3 HIO HIO3 IO2-

d) (3 pts) Na2SO3 Ba(OH)2 CH3NH3Cl KBr

e) (3 pts) SiH4 HI H2S HCl

1. arrangement of compounds in increasing order of pH

a) OH- < Li2CO3 < NaCl < NH4Br

NH4+ hydrolyze to give H+

NaCl salt of strong acid and strong base is neutral (pH 7)

CO3^2- hydrolyze partially to give OH-

OH- strong base

b) CH4 < F- < H2O < HBr

HBr strong acid gives H+ completely

H2O is neutral

F- hydrolyze to give OH-

CH4 covalent

c) IO2- < HIO < HBrO3 < HIO3

IO2- hydrolyze to give OH-

HIO dissociate to give H+

HBrO3 is strong acid but weaker than HIO3

d) Ba(OH)2 < Na2SO3 < KBr < CH3NH3Cl

Ba(OH)2 strongly basic

SO3^2- hydrolyze to give OH-

KBr neutral

CH3NH3+ hydrolyze to give H+

e) SiH4 < H2S < HCl < HI

SiH4 covalent

H2S weak acid dissociate to small extent

HCl and HI are both strong acid, with HI being stronger acid than HCl

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