Introduction:
In this assignment I will be discussing titration, the different calibrations, colorimetry, the
making up of a standard solution and the experimental results achieved. Titration is the
process of slowly adding a solution of known concentration to a solution of unknown
concentration until the reaction between the two is complete. Colorimetry on the other
hand, involves using a colorimeter to calculate the concentration of substances by
measuring how much light is absorbed .To ensure accurate results, it is important to
calibrate the equipment and in this experiment there was a number of equipment that
were needed in this experiment such the calibration of a volumetric pipette , calibration of
balance, calibration of the colorimeter and the calibration of the ph meter. These
calibrations must be done before the titrations.
Equipment list:
• Goggles: Protect your eyes during the experiment.
• Weighing boat: Holds the sodium carbonate for weighing.
• Electronic balance: Measures 2.65g of sodium carbonate accurately.
• Beaker (250cm³): Used to dissolve the sodium carbonate in water.
• Volumetric flask (250cm³): Holds the final solution at a precise volume.
• Funnel: Helps transfer the solution into the volumetric flask without spilling.
• Spatula: Used to transfer sodium carbonate from its container to the weighing boat.
• Sodium Carbonate: The substance being measured and dissolved to create the
standard solution.
• Distilled water in wash bottle: Rinses equipment and dissolves the sodium
carbonate.
Calibration of top pan balance
Calibrating a top pan balance to 0.01g is important for the preparation of the standard
solution because it ensures the accuracy and precision of the mass measurements. Here
is the method of how to calibrate the top balance:
, 1. Place the balance on a flat surface and plug it into the nearest socket in the
laboratory.
2. When switched on press the tare button to ensure the balance reads exactly 0.00g
with no load.
3. Place a dry and clean weighing boat on the balance
4. After that carefully add the solid sodium carbonate using a spatula into the weighing
boat
5. Add small amounts to avoid exceeding the target weight, if you have exceeded the
target weight remove small amounts from the boat to reach the targeted weight.
6. Once the targeted mass is reached (in the case we needed 2.65g of sodium
carbonate)
Importance of Accuracy
Accurate weighing: The use of an electronic balance guarantees that the correct
mass of sodium carbonate is measured.
, Risk Assessment:
Hazard Precaution Emergency Action Risk level
Sodium carbonate Make sure to wear Immediately Low
(Na₂CO₃) powder: the appropriate wash/rinse eyes
Can cause skin/eye PPE while handling and hands with
irritation if this solid to prevent water. If needed
contacted. direct skin contact. immediately seek
The necessary PPE medical assistance
that you will need is if irritation
safety goggles and continues
gloves. Sodium
carbonate can
cause irritation to
the human body
and there are many
reasons why
should protect the
human body as
inhalation can
cause coughing,
sore throat, and
possibly a sore
throat.
Glassware Shattered glass To prevent any of Low
breakage during causes skin cuts these things from
preparation and open wounds if occurring
(e.g., beaker or the glass cuts deep immediately, get
volumetric flask). enough which treatment if injured
leaves the and if not clean up
punctured wound the pieces with a
in a vulnerable dustpan and brush
state open to carefully.
potential serve
infection
Spillage of solution: Make sure work Clean up spills Low
May cause slippery area is always kept immediately with
surfaces, leading to tidy and clean this absorbent material
accidents. should be done to
avoid spillage.
In this assignment I will be discussing titration, the different calibrations, colorimetry, the
making up of a standard solution and the experimental results achieved. Titration is the
process of slowly adding a solution of known concentration to a solution of unknown
concentration until the reaction between the two is complete. Colorimetry on the other
hand, involves using a colorimeter to calculate the concentration of substances by
measuring how much light is absorbed .To ensure accurate results, it is important to
calibrate the equipment and in this experiment there was a number of equipment that
were needed in this experiment such the calibration of a volumetric pipette , calibration of
balance, calibration of the colorimeter and the calibration of the ph meter. These
calibrations must be done before the titrations.
Equipment list:
• Goggles: Protect your eyes during the experiment.
• Weighing boat: Holds the sodium carbonate for weighing.
• Electronic balance: Measures 2.65g of sodium carbonate accurately.
• Beaker (250cm³): Used to dissolve the sodium carbonate in water.
• Volumetric flask (250cm³): Holds the final solution at a precise volume.
• Funnel: Helps transfer the solution into the volumetric flask without spilling.
• Spatula: Used to transfer sodium carbonate from its container to the weighing boat.
• Sodium Carbonate: The substance being measured and dissolved to create the
standard solution.
• Distilled water in wash bottle: Rinses equipment and dissolves the sodium
carbonate.
Calibration of top pan balance
Calibrating a top pan balance to 0.01g is important for the preparation of the standard
solution because it ensures the accuracy and precision of the mass measurements. Here
is the method of how to calibrate the top balance:
, 1. Place the balance on a flat surface and plug it into the nearest socket in the
laboratory.
2. When switched on press the tare button to ensure the balance reads exactly 0.00g
with no load.
3. Place a dry and clean weighing boat on the balance
4. After that carefully add the solid sodium carbonate using a spatula into the weighing
boat
5. Add small amounts to avoid exceeding the target weight, if you have exceeded the
target weight remove small amounts from the boat to reach the targeted weight.
6. Once the targeted mass is reached (in the case we needed 2.65g of sodium
carbonate)
Importance of Accuracy
Accurate weighing: The use of an electronic balance guarantees that the correct
mass of sodium carbonate is measured.
, Risk Assessment:
Hazard Precaution Emergency Action Risk level
Sodium carbonate Make sure to wear Immediately Low
(Na₂CO₃) powder: the appropriate wash/rinse eyes
Can cause skin/eye PPE while handling and hands with
irritation if this solid to prevent water. If needed
contacted. direct skin contact. immediately seek
The necessary PPE medical assistance
that you will need is if irritation
safety goggles and continues
gloves. Sodium
carbonate can
cause irritation to
the human body
and there are many
reasons why
should protect the
human body as
inhalation can
cause coughing,
sore throat, and
possibly a sore
throat.
Glassware Shattered glass To prevent any of Low
breakage during causes skin cuts these things from
preparation and open wounds if occurring
(e.g., beaker or the glass cuts deep immediately, get
volumetric flask). enough which treatment if injured
leaves the and if not clean up
punctured wound the pieces with a
in a vulnerable dustpan and brush
state open to carefully.
potential serve
infection
Spillage of solution: Make sure work Clean up spills Low
May cause slippery area is always kept immediately with
surfaces, leading to tidy and clean this absorbent material
accidents. should be done to
avoid spillage.
