For the followng 0.10M aqueous solution.
NaCI, NaOH, KF, NH4Cl
This is my answer in order of decreasing pH.
NaOH, KF, NaCl, NH4Cl
most basic -> most acidic
Am I right? Why or why not?
2007-10-24 07:49:11 · 2 answers · asked by Tiffany 4 in Science & Mathematics ➔ Chemistry
NaOH --- strong base
NaOH + H2O------- Na+ +OH- pH>7
NaCl------- neutral pH=7
because NaCl is a salt of strong acid and strong base, Cl- is aconjugate base of strong acid.
KF more basic than NaCl pH>7,because it is a salt of weak acid and strong base NH4Cl is acidic pH<7 ,BECAUSE it is a salt of strong acid and weak base
so your order is right,
NaOH>KF> NaCl >NH4Cl
2007-10-24 09:31:04 · answer #1 · answered by sami_dodeen 3 · 0⤊ 0⤋
You are right.
Na+ + OH- completely ionized
Na+ + F- + H2O ===> Na+ + HF + OH- slightly
Na+ + Cl- neutral
NH4+ + Cl- + H2O ===> NH3 + Cl- + H3O+ slightly
2007-10-24 08:11:24 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋