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Amines Acidification with Ammonia

If you add 15 drops of 6M HCl (a source of H+) to a mixture of 10 drops of 6 M ammonia solution and 1 dropperful of demineralized water, what would the following be:
1) pH
2) solubility
3) observed chemical reactions that would occur

If you were to re-basify the solution by adding 20 drops of 6 M NaOH (which is a source of OH-), what would the following be:
1) pH
2) solubility
3) observed chemical reactions that would occur

Using structural formula, how would you write the chemical reaction which explains how the product of the acidification reaction reacts with OH-. How would this explain the changes in solubility?

Solution Preview

If you add 15 drops of 6M HCl (a source of H+) to a mixture of 10 drops of 6 M ammonia solution and 1 dropperful of demineralized water, what would the following be pH, solubility, and the chemical reaction?

Response:

Since HCl is a strong acid while NH3 is a weak base, the pH would be acidic. Not only that but we're adding more moles of HCl than moles of ammonia. pH would be somewhere around pH 2. The chemical reaction would be a typical acid/base reaction with the production of the salt, ammonium chloride. Of course, the salt would be ...

Solution Summary

This solution contains chemical reaction mechanisms for the acidification and re-basification of ammonia as well as pH and solubility. All is accompanied with clear explanations.

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