Both are confusing me. I dont know what information to use (K values)(adsbygoogle = window.adsbygoogle || []).push({});

I'd really appreciate some help!

Calculate the concentration of all species present in a 0.25M solution of ethylammonium chloride (C2H5NH3CL)

(Not sure you if you may need this, but C2H5NH2 has a Kb value of 5.6*10^-4... it is not given in the question, it's in the appendixes of my book, which are used a lot in these problems)

Calculate the pH of a 0.050M Al(NO3)3 solution. Ka value for Al(H2O)6 3+ is 1.4*10^-5.

EDIT: hmmm after reading analyzing it a little bit, I think I'm supposed to find the Kb of C2H5NH2 for the first one.. in other words

1ee-14/5.6ee-4

right?

And that would lead to the answer being

[C2H5NH3 +] =0.25M(% dissociation is insignificant)

[Cl -] =0.25M

[H +] = [C2H5NH2] =2.1ee-6M

Does this look right?

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# Homework Help: PH of solution (not enough infromation?)

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