Classify the following compounds, as used in aqueous chemistry. That is if throw

Question

Classify the following compounds, as used in aqueous chemistry. That is if thrown in water what do you get. The following is a list of possibilities, for each classification. There may be more that I haven’t thought of.

Possibilites. (quite often you will have more than one classification possible for one compound)

Strong Acid (SA)                          Weak acid (WA)                     Soluble salt (SS)                         

Strong Base (SB)              Weak Base (WB)                    Slightly soluble salt (IS)

Diprotic Acid (DA)                      Diprotic base (DB)     

Triprotic acid (TA)                       Triprotic base (TP)

11

NH4CN

12

CH3CH2 CH2NH3F

13

CH3CH2OH

14

dibasic threonine

15

postassium thiosulfate

11

NH4CN

12

CH3CH2 CH2NH3F

13

CH3CH2OH

14

dibasic threonine

15

postassium thiosulfate

Explanation / Answer

NH4CN ---> souluble salt, very weak base

CH3CH2 CH2NH3F --> CH3CH2CH2NH3+ and F-

The F- is strong acid so

F- + H2O --> HF + OH; weak base

CH3CH2OH --> very weak acid

dibasic threonine --> diprotic base

postassium thiosulfate --->> weak base ; The salt will hydrolyze to form OH- ions in aqueous solution:
SCN- + H2O ----> HSCN + OH-

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