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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: MitchTwitchita on October 10, 2007, 01:28:29 PM

Title: Acid Base Reactions
Post by: MitchTwitchita on October 10, 2007, 01:28:29 PM

Hey guys, I'm not sure if I'm doing these questions right or not.  Can anybody let me know?  And if not, can you point me in the right direction?

Each of the following salts can be prepared from an acid and a base.  Write the balanced molecular equation and the net ionic equation for the preparation of each.  Indicate states of the reactants and products [(aq), (l), (s)].

(a) Fe(NO3)3 (aq)    (b) LiBr (aq)     (c) KHCO3 (aq)

For (a):  3HNO3 (aq) + Fe(OH)3 (s) ---> Fe(NO3)3 (aq) + 3H2O (l)
Net ionic:  3H+ (aq) + Fe(OH03 (s) ---> Fe2+ (aq) + 3H2O (l)

For (b):  HBr (aq) + LiOH (aq) ---> LiBr (aq) + H2O (l)
Net ionic:  H+ (aq) + OH-(aq) ---> H2O (l)

For (c):  H2CO3 (aq) + KOH (aq) ---> KHCO3 (aq) + H2O (l)
Net ionic:  H+ (aq) + OH- (aq) ---> H2O (l)

For some reason some of these just don't seem right.  Any thoughts?

Title: Re: Acid Base Reactions
Post by: AWK on October 11, 2007, 01:05:06 AM

Net ionic:  3H+ (aq) + Fe(OH03 (s) ---> Fe2+ (aq) + 3H2O (l)
3H+ (aq) + 3OH-(aq) = 3H2O(l)

Title: Re: Acid Base Reactions
Post by: LQ43 on October 11, 2007, 01:05:37 PM

umm...my textbook says to keep things that are (s) together, they don't dissociate


Wouldn't you keep the Fe(OH)3 (s) and have Fe3+(aq) also on the other side?

Title: Re: Acid Base Reactions
Post by: AWK on October 11, 2007, 01:23:48 PM

Quote

Wouldn't you keep the Fe(OH)3 (s) and have Fe3+(aq) also on the other side?

Fe(OH)3 even in solid state is at least partially ionic compound but Fe(OH)3 may be also accepted.