Ochem Help please- sodium arcenate (Na3AsO4)

[ponybreeder4]

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Can somebody please help me with this:
i need to sketch a titration curve for 10mL of .100M Na3AsO4 titrated with .100M HCl
pka 1=2.25
pka2= 6.77
pka 3= 11.60
i need the ph's at 0 ml, 5ml, etc...increments of 5 ml
how do i approach this problem?
i think sodium arcenate is a base..so ph would start high, but then why is pka 1 2.25?
if i do mivi=m2v2 i feel like im not getting anything
please help set me in the right direction when approaching this problem

 

[loveoforganic]

pKa values are for protonated form. Not a homework forum. Try chemicalforums.com.

 

[greatnt249]

Can somebody please help me with this:
i need to sketch a titration curve for 10mL of .100M Na3AsO4 titrated with .100M HCl
pka 1=2.25
pka2= 6.77
pka 3= 11.60
i need the ph's at 0 ml, 5ml, etc...increments of 5 ml
how do i approach this problem?
i think sodium arcenate is a base..so ph would start high, but then why is pka 1 2.25?
if i do mivi=m2v2 i feel like im not getting anything
please help set me in the right direction when approaching this problem

A better question would be "what does sodium arsenate have to do with organic chemistry"?

 

[loveoforganic]

😏

 

[ksmi117]

SDN is not a forum for homework help. I'm closing this thread.