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

Answer 1

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-