Volumetric analysis
Exercise 1
|
Volume
|
|
| Start |
1.40
mls
|
| Finish |
22.22
mls
|
| Total |
Volume
|
A 25 ml sample hydrochloric acid solution was titrated against a 0.045 M Na2CO3 solution. The volume of NaCO3 solution delivered with the burette that was required to reach the end point is given on the left.
Calculate the concentration of hydrochloric acid in the test sample.
The equation for the reaction is shown below.
Step 1 Calculate
the mole of substance delivered from the burette. In this case sodium
carbonate
Mole = Volume(litres) X Concentration
Step 2 Using
the equation calculate the number of mole of substance in the test sample.
In this case HCl.
Step 3 Find the concentration of the substance in the test sample. In this case find the concentration of acid in the 25 ml sample