I
iTeachChem3w ago
ns

Solubility question - Ionic equilibrium

Wanted help in this question. Can't really figure out how to go about it...
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9 Replies
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hardcoreisdead
ques is wrong ?? 1. solubility of salt (na2c2o4 ) is found not acid (h2c2o4) 2. Ksp not given
iTeachChem
iTeachChem3w ago
Common ion effect! You can find ksp from this data. 4s3, s is given to be 1.06 Also, this forms a buffer
ns
nsOP3w ago
Yes... that's where I was confused. The ans key says the ans is D... I was getting B as the answer
hardcoreisdead
oh rightt
ns
nsOP3w ago
We'll use pH = pka1+pka2/2 to get the H+ concentration right? And then (0.2+s) times the calculated value of H+ squared... and equate it to the Ksp we calculated using the given conc. Is this right? Or am I going wrong somewhere?
iTeachChem
iTeachChem2w ago
I feel B too should be right. But that is without calc haha. Guesstimate. we good?

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