1. Classify the following compounds, as used in aqueous chemistry. That is if th
ID: 941424 • Letter: 1
Question
1. 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)
KH2PO4
HO2CCHCHCO2H
HOCH2CH2NH2
K2HPO4
Hg2(CN)2
KH2PO4
HO2CCHCHCO2H
HOCH2CH2NH2
K2HPO4
Hg2(CN)2
Explanation / Answer
KH2PO4 => It is a solt of ammonium. But since there are two ionisable H+ ions in the molecule, the compound is slighly acidic. Hence it is a weak triprotic acid as well as a salt.
HO2CCHCHCO2H => it has two ionisable H+ ions from the COOH group. Hence, the compound is a weak diprotic acid
HOCH2CH2NH2 => since there is an amine group, the compound is basic. It is weakly basic since NH2- groups are weak bases.
K2HPO4 => it is a salt of potassium and since there is one ionisable H atom, it is weakly acidic
Hg2(CN)2 => it a slightly soluble salt.
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