Question

passport #9: naming binary ionic compounds
write the ionic charges for the following multivalent ions.
multivalent metal\tionic charges\tmultivalent metal\tionic charges
fe\t\tco\t
cu\t\tni\t
hg\t\tsn\t
pb\t\tau\t

Explanation:

Step1: Recall ionic charges of multivalent metals

• Iron (Fe): commonly \( +2 \) (ferrous) and \( +3 \) (ferric)
• Copper (Cu): \( +1 \) (cuprous) and \( +2 \) (cupric)
• Mercury (Hg): \( +1 \) (mercurous, as \( \text{Hg}_2^{2+} \)) and \( +2 \) (mercuric)
• Lead (Pb): \( +2 \) and \( +4 \)
• Cobalt (Co): \( +2 \) and \( +3 \)
• Nickel (Ni): \( +2 \) (common), sometimes \( +3 \)
• Tin (Sn): \( +2 \) (stannous) and \( +4 \) (stannic)
• Gold (Au): \( +1 \) (aurous) and \( +3 \) (auric)

Step2: Fill the table with ionic charges

Multivalent Metal	Ionic Charges	Multivalent Metal	Ionic Charges
Cu	\( +1, +2 \)	Ni	\( +2 \) (or \( +2, +3 \))
Hg	\( +1 \) (as \( \text{Hg}_2^{2+} \)), \( +2 \)	Sn	\( +2, +4 \)
Pb	\( +2, +4 \)	Au	\( +1, +3 \)

Answer:

The ionic charges for the multivalent metals are filled in the table as shown above. For example:

• Fe: \( +2, +3 \)
• Cu: \( +1, +2 \)
• Hg: \( +1 \) (as \( \text{Hg}_2^{2+} \)), \( +2 \)
• Pb: \( +2, +4 \)
• Co: \( +2, +3 \)
• Ni: \( +2 \) (or \( +2, +3 \))
• Sn: \( +2, +4 \)
• Au: \( +1, +3 \)