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Defining the meaning of acids and bases, conjugate acid, conjugate base

Submitted by adair22 on Sat, 04/21/2007 - 19:41

why is the h+ ion the same as a proton

determine the conjugate acid-bade pairs in each of the folowing reactions.
nh3[aq]+h2o[1]= nh4+[aq] +oh-[aq] 
hno2[aq]+h2o[1] = h30+[aq] +no2-[aq]
hcn[aq]+h2o[1] = h30+[aq] +cn-[aq]

i just transfured to a new school and they teach so difrent so im not realy understanding i dont need andsweers just need to know how im saposto figure it out?!!!

there are 3 types of acid/bases

arrhenius acids
bronsted acids
lewis acids

the ones you mention above are bronsted acids/bases

an acid is defined as a proton (H+) donor and a base a proton acceptor.

in every reaction identify the acid and the base.

in your first reaction the water is behaving as the acid. if you look at your products, the NH3 has gained another has accepted the H+

therefore it is the base......the NH3

once it has accepted the H it makes NH4+  this is its conjugate acid