Why is 0.1 M CH3COOH acidic and 0.1 M CH3COONa basic?

Question

The question reads Except for the Na+ Spectator ion, aqueous solutions of CH3COOH and CH3COONa contain the same species.

1) What are the species other than H2O
(i don't really get what this question is even asking)

2) Why is -1 M CH3COOH acidic and .1 M CH3COONa basic?

Any help is greatly appreciated

Answer 1

first of all Na is always neutral in soolution. so u have

CH3COOH which could also be written as HC2H3O2 or acetic acid.

CH3COO- or C2H3O2- is the conjugate base of acetic acid.
recall that a bronstead-lowry base is 1 less H+ than its conjugate acid.

1)the species are HC2H3O2, H+, and C2H3O2-
2) 0.1M acetic acid is acidic and 0.1M NaC2H3O2 is basic since Na is neutral and C2H3O2- is the conjugate base of HC2H3O2.

PS. this question was probably for u to realize that CH3COOH is HC2H3O2.

Answer 2

CH3COOH is acidic because according to the Bronsted Lowery theroy, an acid donates an H+ ion and CH3COOH donates an H+ so it is an acid

CH3COONa is a base because when you put that into water,
it will dissolve into CH3COO- and Na+
since this will break up the water into HO- and H+ , the H+ will react with the CH3COO- to form CH3COOH
according to the Bronsted Lowery theory, a base is anything that excepts an H+ and thus CH3COONa is a base

Answer 3

1) H2O <-----> H3O+ + HO-

2) CH3COOH has a hydrogen that can undergo dissocilation (sp) and there for the equation in water is.

CH3COOH <----> CH3COO- + H+

CH3COONa on the other hand wants to react with a H+ to form
CH3COOH

CH3COONa + HX <----> CH3COOH + NaX

because of its affiancy to protons it is consided basic.