SO_4^2- (aq) + H_2O(l) HSO_4 (aq) + OH^- (aq) base SO_4^2-conjugate acid HSO_4^-

Question

SO_4^2- (aq) + H_2O(l) HSO_4 (aq) + OH^- (aq) base SO_4^2-conjugate acid HSO_4^-; acid H_2O conjugate base OH^- acid SO_4^2- conjugate base HSO_4^-; base H_2O conjugate acid OH^- base SO_4^2- conjugate base HSO-4^-; acid H_2O conjugate acid OH^- acid SO_4^2- conjugate acid HSO_4; base H_2O conjugate base OH^- HBr(aq) + H_2O(l) rightarrow H_3O^+ (aq) + Br^- (aq) base H_2O conjugate base H_3O^+: acid HBr conjugate acid Br^- acid H_2O conjugate base H_3O^+;base HBr conjugate acid Br^- base H_2Oconjugate acid H_3O^+ acid HBr conjugate base Br^- acid H_2O conjugate acid H_3O^+; base HBr conjugate base Br^- HNO_2(aq) + CH_3 - NH_2(aq) NO_2^- (aq) + CH_3 - NH_3^+ (aq) acid HNO_2 conjugate base NO_2^-: base CH_3 - NH_2 conjugate acid CH_3 - NH_3^+ acid CH_3 -NH_2 conjugate acid CH_3 - NH_3^+; base HNO_2 conjugate base NO_2^-

Explanation / Answer

In general:

First, let us define Bronsted Lowry acid/base:

Bronsted Lowry acid: any species that will donate H+ (protons) in solution, and makes pH lower (i.e HCl)

Bronsted Lowry base: any species that will accept H+ (protons) in solution, and makes pH higher (NH3 will accept H+ to form NH4+)

Typically, acid/bases are shown in the left (reactants)

when we write the products:

Bronsted Lowery conjugate base = the base formed when the B.L. acid donates its H+ proton ( i.e. HCl -> Cl-

Bronsted Lowery conjugate acid = the acid formed when the B.L. base accept its H+ proton ( i.e. NH4+ has accept H+ proton)

Note that, typically conjugate bases/acids are shown in the right (product) side

B)

SO4-2 gains H+, so this is a BASE

H2O doantes H+, so this is an ACID

HSO4- is therefore, the conjguate acid

OH- is the conjugate base

c)

HBr donates H+, therefore, it is an acid

H2O accept H, therefore a base

H3O+, is the conjugate acid

BR- is the conjugate base

d)

HNO2 --> donates H+, it is an acid

CH3-NH2 --> accepts H+, therefore base

NO2- is the conjugate base

CH3-NH3+ --> this is a conjugate acid

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