Table 3

Degree of Spent Acid	Case	Density, mg/l	pH	HCl Concentration, wt%	Sulfate Concentration, mg/l
15 wt% Live HCl	Acid	1.07	0	15.42	2300
15 wt% Live HCl	Mixtures	1.04	0	3.86	3510
10 wt% Partially Spent HCl	Acid	1.1	0	9.58	2820
10 wt% Partially Spent HCl	Mixtures	1.05	0.08	2.65	3600
5 wt% Partially Spent HCl	Acid	1.17	0	5.03	3350
5 wt% Partially Spent HCl	Mixtures	1.06	0.4	1.37	3810
1 wt% Partially Spent HCl	Acid	1.18	0.5	1.11	3600
1 wt% Partially Spent HCl	Mixtures	1.07	1.1	0.28	3850
0 wt% Completely Spent HCl	Acid	1.2	7.7	0	3920
0 wt% Completely Spent HCl	Mixtures	1.19	7.8	0	3940

Table 3: Properties of spent acids and mixtures of acid with seawater.