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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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wrote...
12 years ago
I have an unknown solution with a pH of 10. I added 10 drops of my unknown solution with 2-3 drops of 6M NaOH. I then put this solution into a warm water bath and placed a strip of wet, red litmus paper over the tip. The paper then turned blue which meant that NH3 was present. I believe that my unknown solution was NH3. How would I write the above reactions into balanced chemical equations?
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wrote...
#1
12 years ago
unknowns that have NH4+ react with th OH- from NaOH

NH4+1  & OH- => NH3 / H2O  (aka NH4OH)

heating it decreases the solubility of the NH3 in the H20 ...& it fumes out

those fumes re-dissolve into the water on the wet red litmus:

NH3 & H2O => NH4OH

it makes very little NH4OH

but the NH4OH will release enough OH- ion to turn the litmus blue:

NH4OH Rightwards Arrow NH4+  & OH-
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