Consider the following data on some weak acids and weak bases: acid base name fo

Question

Consider the following data on some weak acids and weak bases: acid base name formula name formula aceticacid|HCH3CO2 1.8x10 I |hydroxylamine! HONH2|11x108 hypochlorous acid HCIO 3.0x 10 HCH CO2 1.8x10 ylamine HONH 1.1x 10 ethylamine C NH26.4x 10 Use this data to rank the following solutions in order of increasing pH. In other words will have the lowest pH, a "2' next to the solution that will have the next lowest pH, and so on. , select a '1' next to the solution that solution pH 0.1 M HONH3Br 0.1 M KCH3CO2 0.1 M KNO3 0.1 M C2HsNH3C

Explanation / Answer

Explanation

The given acids are weak acids and when they react with a strong base like KOH (potassium hydroxide), they form conjugate bases. The weaker the acid (lower Ka) , the stronger base (higher pH) it will form.

The given bases are weak bases and when they react with a strong acids like HCl (hydrochloric acid) or HBr (hydrobromic acid), they form conjugate acids. The weaker the base (lower Kb) , the stronger acid (lower pH) it will form.

Solution pH 0.1 M HONH3Br 1 0.1 M KCH3CO2 4 0.1 M KNO3 3 0.1 M C2H5NH3Cl 2

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