Question

Determine the strength and amount of given HCl in the given solution by pH metry A standard solution of NaOH of 0.1N is provided.

Volume of NaOH (mL) pH
0 1.26
1 1.33
2 1.39
3 1.46
4 1.54
5 1.63
6 1.72
7 1.84
8 1.98
9 2.18
10 2.52
11 10.51
12 11.54
13 11.8
14 11.96
15 12.07
16 12.15
17 12.22
18 12.27
19 12.32
20 12.36
Volume of NaOH (mL) pH d(pH)/dV

10 2.52 0.472076
10.1 2.58 0.525978
10.2 2.63 0.594324
10.3 2.7 0.683825
10.4 2.78 0.806122
10.5 2.88 0.983363
10.6 3.01 1.263603
10.7 3.19 1.775082
10.8 3.49 3.024423
10.9 7 35.11449
11 10.51 2.996313
11.1 10.81 1.746971
11.2 10.98 1.23549
11.3 11.11 0.955247
11.4 11.2 0.778003
11.5 11.28 0.655703
11.6 11.35 0.566198
11.7 11.4 0.497847
11.8 11.45 0.443939

Answer 1

Answer:

7 1.84

8 1.98

9 2.18

10 2.52

11 10.51

12 11.54

13 11.8

14 11.96

15 12.07

16 12.15

17 12.22

18 12.27

19 12.32

Answer 2

Answer:

1. The molarity of hydrochloric acid is determined by titrating it against the standard solution of sodium carbonate using methyl orange as indicator.

2. Strength of the acid is determined by multiplying its molarity with its molecular mass which is 36.5.