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. 2016 Mar 31;4:13. doi: 10.3389/fchem.2016.00013

Table 1.

Speciation of Aqueous [AuCl4] at Various pH values.

pH Gold ion species (%)
AuCl4- AuCl3 (OH) AuCl3 (H2O) AuCl2 (OH)2 AuCl2 (OH)3 Au (OH)4-
1 100 0 0 0 0 0
2 90 4 6 0 0 0
3 50 20 30 0 0 0
4 8 33 47 12 0 0
5 0 12 18 52 18 0
6 0 0 1 20 75 4
7 0 0 0 2 70 28
8 0 0 0 0 20 80
9 0 0 0 0 3 97
10 0 0 0 0 0 100
11 0 0 0 0 0 100
12 0 0 0 0 0 100