[WHITECHIC9]

please help me figure out how to rank from weakest to strongest base.
KCl, NaOH, C6H5NH2, NH3, NaC6H5O.

[Astrokel]

hey,

you need to show some attempt, you can figure out easily the strongest and weakest base. so it left with 3 of the other in between, now consider its ease of protonation.

[WHITECHIC9]

well i did try , i put C6H5NH2 for the weakest, then NaC6H5O, NH3, KCl, the strongest is NaOH. COrrect? KCl is strong becuase KOH is right?

[Astrokel]

KCl is strong becuase KOH is right?

what? KCl is a salt

[WHITECHIC9]

so then it is a weak base? How do you make an equation for that to show how it breaks up?

[Astrokel]

hey,

no, KCl is a neutral salt(salt between strong acid and strong base) as it contains K⁺ & Cl^- in aqueous form.

[WHITECHIC9]

ok i understand that now, but now the C6H5NH2 is confusing me. what are the prducts if it reacts with H2O? If i make an equation will that help me see if it's weak or strong? i did C6H5NH2 + H2O= NH3+ HC6H5O is that right?

[Astrokel]

C6H5NH2 + H2O= NH3+ HC6H5O

hydrolysis like this is not strong enough to break the strong covalent bond.

C₆H₅NH₂ + H₂O  C₆H₅NH₃⁺ + OH^-

It does tells you it is basic but it doesn't tell you the relative basicity.

[WHITECHIC9]

ok well NaC6H5O is stronger base than C6H5NH2 right? I did NaC6H5O + H2O= NaOH+ HC6H5O, correct? that gives you a strong base and weak acid..

[Astrokel]

hello,

well, your equation is wrong, and i think you shouldn't rely on hydrolysis of salt or ion to determine the pH, do you know how to determine the relative basicity of organic compound? (inductive,resonance..)

[WHITECHIC9]

no but i dont need to know the ph...