What is the equivalence point?? Trial # Volume of NaOH used(mL) pH 1 0 3.19 2 1.
ID: 934093 • Letter: W
Question
What is the equivalence point??
Trial #
Volume of NaOH used(mL)
pH
1
0
3.19
2
1.5
3.69
3
2.5
3.85
4
3.5
3.98
5
4.5
4.15
6
5.5
4.29
7
7
4.48
8
9.5
4.7
9
12
4.9
10
13.5
4.98
11
15
5.17
12
17
5.41
13
17.8
5.6
14
18.8
5.89
15
19
6.3
16
22.5
11.27
17
25
13.42
18
26
13.7
19
26.5
13.89
20
27
13.99
21
27.5
14.09
22
28
14.5
23
28.5
14.6
Trial #
Volume of NaOH used(mL)
pH
1
0
3.19
2
1.5
3.69
3
2.5
3.85
4
3.5
3.98
5
4.5
4.15
6
5.5
4.29
7
7
4.48
8
9.5
4.7
9
12
4.9
10
13.5
4.98
11
15
5.17
12
17
5.41
13
17.8
5.6
14
18.8
5.89
15
19
6.3
16
22.5
11.27
17
25
13.42
18
26
13.7
19
26.5
13.89
20
27
13.99
21
27.5
14.09
22
28
14.5
23
28.5
14.6
Explanation / Answer
if we draw a graph between volume of NaOH added on x-axis and pH on y axis we get a curve
the equivalencepoint will be the corresponding volume for which the pH is 7 . so if we draw a line from 7 on y-axis on to the curve it intersects at a point. now we draw line from that point to x-axis we will get the volume thus equivalence point.
according to points given it will be between 19 and 22.5 ml most probably 19.6-20ml
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