Tuesday
October 21, 2014

Homework Help: Chemistry

Posted by Trixie on Tuesday, February 23, 2010 at 5:04pm.

Calculate the initial molarity of KNH2 and the molarities of K+, NH3, OH-, and H3O+ in an aqueous solution that contains 0.75 g of KNH2 in 0.255 L of solution. You may ignore the reaction of NH3 with water.

I already found the initial molarity, but I am not sure how to find each species concentration with the information given. Please explain how to solve rather than give me only answers--they are helpful to compare but I want to learn how to do this. I know how to set up the ICE chart, but am unsure what to set my equation equal to.

The equation I am using for my ICE chart is set up as NH2^- + HOH --> NH3+OH^-....I am a little confused where I find the concentration of H3O+

(DrBob, I did see your explanation, and I see the general idea of how to proceed with this, but am stuck)

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