Concentrate on keeping up your standards:
Titration:
Equipment List:
•1 x 50 cm3 Burette
• 1 x 25 cm3 bulb pipette and pipette filler
• 1 x plastic funnel
• 250 cm3 conical flask
• Thermometer
• 1 x clamp
• White tile or White Paper
• 1 x stand
• Volumetric Flask
• Balance
• Pipette
• Weighing Boat
• Glass Rod
• Hydrochloric Acid
• Sodium Carbonate solid
• Methyl Orange Indicator
Part 1: (Preparing the standard solution)- Method:
Before preparing the standard solution, it important to thoroughly wash and dry the
equipment being used with distilled water, to ensure wasn’t contaminated by any
chemicals from previous practicals.
Also, the balance had to be calibrated before preparing the solution. To calibrate a
balance, you use a range of weights (0.1g, 1.0g, 10g, and 100g) and place them
one at a time onto the balance that has been set to 0. If the reading shown on the
balance is not true to the measurement of the weight, the balance is then altered
with a collaboration key to the true weight.
Once the scale was been collaborated and the equipment was been washed,
between 1.25 and 1.45 grams the sodium carbonate solid could be weighed in a
weighing boat (the final weight was 1.35g). The solid was then transferred into a
250ml beaker with washings in order to get all of the solid out of the weighing boat.
The empty weighing boat was then placed onto the balance which read 0.00g
meaning that all of the solid had been accurately transferred into the beaker.
, Next, 150cm3 of distilled water was added to the 250ml beaker, and stirred with a
glass rod until all of the solid had dissolved. Once the solid had dissolved, the glass
rod was washed with distilled water to ensure there was no left over solution and
then the solution was transferred carefully with washings into the 250cm 3
volumetric flask. Distilled water was used to make the solution reach the mark on
the volumetric flask, then the lid was secured on and the contents shaken to make
sure the solution was combined with the additional distilled water.
Part 2: (Standardisation of an acid)- Method-
Once the standard solution had been made up, it could then be used within the
titration process. Firstly, it was important to calibrate both the pipette and Burette.
To calibrate the pipette, a smaller beaker was taken and weighed (111.81g), then
25cm3 of distilled water was pipetted into the beaker. The beaker was then weighed
with H2O (136.70).
Overall volume of H2O in glass beaker-
Mass of pipette= 24.89g
Temperature of H2O= 18C
Density of H2O= 0.998595 (From Handbook of Chemistry and Physics 53rd
Edition)
Volume= mass/density
24.89/0.998595= 24.9cm3
Overall volume of H2O in beaker= 24.9cm3
This means that even though the mass was fairly accurate it was still slightly off,
however this was just a collaboration. The sodium carbonate was then put into the
conical flask using the pipette and a 3 drops of methyl orange indicator was added.
Before starting the titration process, the burette was collaborated by again weighing
a smaller beaker (112.9g) and adding 50cm 3 distilled water to the burette. This was
then all released into the empty and pre-weighed glass beaker and then it was
weighed again with the distilled water in (162.9g).
Overall volume of H2O in glass beaker=
Mass of burette= 50g
Temperature of H2O= 18C
Density of H2O= 0.998595 (From Handbook of Chemistry and Physics 53rd
Edition)
Volume= mass/density
50/0.998595= 50.07cm3
Overall volume of H2O in beaker= 50.07cm3
Hydrochloric acid was then added to the burette up to the 0cm 3 mark, ready to
begin the titration process. The Hydrochloric acid, was slowly added into the conical
Titration:
Equipment List:
•1 x 50 cm3 Burette
• 1 x 25 cm3 bulb pipette and pipette filler
• 1 x plastic funnel
• 250 cm3 conical flask
• Thermometer
• 1 x clamp
• White tile or White Paper
• 1 x stand
• Volumetric Flask
• Balance
• Pipette
• Weighing Boat
• Glass Rod
• Hydrochloric Acid
• Sodium Carbonate solid
• Methyl Orange Indicator
Part 1: (Preparing the standard solution)- Method:
Before preparing the standard solution, it important to thoroughly wash and dry the
equipment being used with distilled water, to ensure wasn’t contaminated by any
chemicals from previous practicals.
Also, the balance had to be calibrated before preparing the solution. To calibrate a
balance, you use a range of weights (0.1g, 1.0g, 10g, and 100g) and place them
one at a time onto the balance that has been set to 0. If the reading shown on the
balance is not true to the measurement of the weight, the balance is then altered
with a collaboration key to the true weight.
Once the scale was been collaborated and the equipment was been washed,
between 1.25 and 1.45 grams the sodium carbonate solid could be weighed in a
weighing boat (the final weight was 1.35g). The solid was then transferred into a
250ml beaker with washings in order to get all of the solid out of the weighing boat.
The empty weighing boat was then placed onto the balance which read 0.00g
meaning that all of the solid had been accurately transferred into the beaker.
, Next, 150cm3 of distilled water was added to the 250ml beaker, and stirred with a
glass rod until all of the solid had dissolved. Once the solid had dissolved, the glass
rod was washed with distilled water to ensure there was no left over solution and
then the solution was transferred carefully with washings into the 250cm 3
volumetric flask. Distilled water was used to make the solution reach the mark on
the volumetric flask, then the lid was secured on and the contents shaken to make
sure the solution was combined with the additional distilled water.
Part 2: (Standardisation of an acid)- Method-
Once the standard solution had been made up, it could then be used within the
titration process. Firstly, it was important to calibrate both the pipette and Burette.
To calibrate the pipette, a smaller beaker was taken and weighed (111.81g), then
25cm3 of distilled water was pipetted into the beaker. The beaker was then weighed
with H2O (136.70).
Overall volume of H2O in glass beaker-
Mass of pipette= 24.89g
Temperature of H2O= 18C
Density of H2O= 0.998595 (From Handbook of Chemistry and Physics 53rd
Edition)
Volume= mass/density
24.89/0.998595= 24.9cm3
Overall volume of H2O in beaker= 24.9cm3
This means that even though the mass was fairly accurate it was still slightly off,
however this was just a collaboration. The sodium carbonate was then put into the
conical flask using the pipette and a 3 drops of methyl orange indicator was added.
Before starting the titration process, the burette was collaborated by again weighing
a smaller beaker (112.9g) and adding 50cm 3 distilled water to the burette. This was
then all released into the empty and pre-weighed glass beaker and then it was
weighed again with the distilled water in (162.9g).
Overall volume of H2O in glass beaker=
Mass of burette= 50g
Temperature of H2O= 18C
Density of H2O= 0.998595 (From Handbook of Chemistry and Physics 53rd
Edition)
Volume= mass/density
50/0.998595= 50.07cm3
Overall volume of H2O in beaker= 50.07cm3
Hydrochloric acid was then added to the burette up to the 0cm 3 mark, ready to
begin the titration process. The Hydrochloric acid, was slowly added into the conical
