We’re being asked to determine which among the aqueous mixtures would be a common ion system.
The common ion system means that there is a presence of a common ion.
For H2PO4–, HCO3–:
• both are ions and they are different → not a common ion system
Which, if any, of the following aqueous mixtures would be a common ion system?
A common ion solution will have two components which differ by only one ion. For example: NaCl and HCI
A. None of these will be a common ion solution.
B. H2PO4–, HCO3–
C. CH3COOH, NaH2PO4
D. H2CO3, HCO3–
E. HSO4–, HSO3–
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