Time |
Acids |
Hydrochloric acid |
Sulfuric acid |
Phosphoric acid |
0.1N |
0.5N |
1N |
2N |
0.1N |
0.5N |
1N |
2N |
0.1N |
0.5N |
1N |
2N |
2 days |
48 |
48 |
48 |
49 |
48 |
48 |
48 |
49 |
48 |
48 |
49 |
49 |
7 days |
49 |
50 |
51 |
52 |
49 |
51 |
52 |
52 |
50 |
52 |
53 |
55 |
15 days |
54 |
55 |
56 |
57 |
53 |
56 |
57 |
58 |
56 |
58 |
61 |
64 |
30 days |
56 |
58 |
62 |
63 |
56 |
59 |
62 |
69 |
60 |
64 |
70 |
74 |
45 days |
60 |
62 |
64 |
67 |
60 |
61 |
66 |
62 |
66 |
68 |
63 |
66 |
60 days |
63 |
65 |
68 |
61 |
64 |
65 |
63 |
0 |
68 |
54 |
0 |
0 |
|