acids and bases

58:42

29:55

4:37

32:34

3:13

11:37

2:43

6:22

2:05

51:42

3:10

14:38

33:17

11:39

45:32

18:35

13:33

11:33

4:35

10:51

2:25

3:46

29:31

4:47

3:56

5:12

5:41

10:27

16:49

15:25

12:40

11:18

2:19:27

11:44

1:23:35

11:52

2:50:24

2:02

5:49

9:23

9:54

4:12

5:15

1:38:32

55:50

16:46

25:54:09

6:04

6:01

6:46:42

13:33

42:47

15:10

1:10:55

24:59

4:57

5:10

4:18

31:26

17:05