Unit 2: Practical Scientific Procedures and Techniques
Unit 2D: How am I doing?
Vocational Scenario:
I am a newly appointed technical assistant at a large chemical plant, Chemcalequip. In order to complete
my induction period and progress within the company I have to review and evaluate my performance of
the procedures and techniques that I have been involved in using so far (titration, colorimetry,
calorimetry and chromatography.) I need to identify the key practical and personal competencies I have
shown whilst developing and using these skills. I must evaluate my own performance, interpersonal
skills and professional practice. The report I produce will be assessed by a senior technician.
Introduction:
In this unit I have undertaken numerous practical's in the previous three units. In unit 2A I had
performed titration multiple times each with different chemicals and equipment. As well as producing a
standard solution and colorimetry. In unit 2B, I performed calorimetry not to be confused with
colorimetry. In unit 2C I performed chromatography specifically paper and thin layer chromatography.
Unit 2A:
In Unit 2A I performed six experiments which were: producing a standard solution of sodium carbonate,
titration of sodium carbonate with hydrochloric acid using a phenolphthalein indicator, titration of
sodium hydroxide with hydrochloric acid using a phenolphthalein indicator, titration of sodium
hydroxide with hydrochloric acid using a methyl orange indicator, titration of sodium hydroxide with
hydrochloric acid using a pH probe and colorimetry.
Unit 2A: Making a standard solution
The process of making a standard solution serves is an essential procedure for scientific experimentation
and analysis. At its core, a standard solution embodies precise concentrations of a solute dissolved in a
solvent, meticulously prepared to serve as a reference point for quantitative measurements and
chemical analyses. This meticulous procedure is not only essential but also serves as the starting point
for various analytical techniques the most common technique being titration. Titration which is a
common method in analytical chemistry relies heavily on the accurate preparation of standard solutions
as the basis for determining the concentration of an unknown substance in a solution. So, the creation
,of standard solutions not only embodies the principles of precision and accuracy but also represents the
starting point in multiple scientific procedure specifically in titration.
Personal competence:
What skills could I do before What skills did I develop What skills did I gain during
completing the practical during the practical the practical
Basic understanding of Precision in measuring and Enhanced understanding of
concentration concepts mixing chemicals chemical calculations
Familiarity with lab equipment and Attention to detail in Improved organisation and
safety protocols following procedures record-keeping skills
Ability to perform simple Adaptability in adjusting Increased confidence in
calculations procedures as needed handling chemicals
Communication skills for reporting Collaboration and teamwork Advanced problem-solving
procedures in group settings abilities
Throughout the process of making standard solutions, my development of key personal competencies
was evidenced in various aspects of the experiments. For instance, when precisely measuring 2.65g of
Na2CO3, I demonstrated a keen attention to detail, ensuring that the concentrations were accurately
prepared. This attention to detail was particularly evident in instances where I meticulously followed
procedures, such as using calibrated equipment like the weighing balance and following specific
protocols.
Also, my adaptability was put to the test when encountering unexpected challenges during the
experiments. For example, when faced with equipment malfunctions or variations in environmental
conditions, like with the weighing balance fluctuating due to a draft, I effectively adjusted procedures to
maintain the integrity of the standard solutions by moving away from the draft. These instances
highlighted the importance of remaining flexible and resourceful in scientific endeavours. The
development of organisational skills was apparent in my ability to maintain a well-organised workspace
and comprehensive records throughout the experiments for the calculations of the mass of NaOH
needed.
Also, collaboration and teamwork were important components of the experimental process, particularly
in group settings. Through effective communication and cooperation with peers, we were able to
streamline processes, troubleshoot challenges collectively, and share insights and observations,
ultimately enhancing the overall efficiency and quality of our work.
Evaluation of skills:
, Creating standard solutions has been helpful in developing my foundational skills for scientific practice.
Precision in measuring and mixing chemicals has been essential, ensuring that solutions are accurately
prepared to specified concentrations. This skill is crucial in both academic research and industrial
settings, where exact measurements are essential for reliable data analysis and experimentation.
Attention to detail in following procedures has become second nature through practical experience,
ensuring that protocols are meticulously followed and minimising the potential for errors in
experimental setups. This competency is vital in maintaining the integrity and consistency of
experiments, which is crucial for producing credible scientific results.
Adaptability in adjusting procedures as needed has been essential in overcoming challenges and refining
experimental methods. This skill has prepared me to handle unexpected variables effectively and
optimise experimental processes for better outcomes. It has also fostered a proactive approach to
problem-solving, which is invaluable in scientific research where flexibility and creativity are often
required.
Collaboration and teamwork in group settings have significantly enhanced my ability to work effectively
with others and contribute meaningfully to scientific projects. This skill is essential in research teams and
laboratory environments, where collective expertise and diverse perspectives are leveraged to achieve
common goals. It has strengthened my communication skills, allowing me to convey ideas clearly and
collaborate productively with team members to tackle complex scientific challenges.
Maintaining and enhancing competence:
To improve my skills, I need to focus on better understanding and maintaining laboratory equipment.
This can be achieved by focusing on extra training, seeking guidance from experienced specialists such
as lab technicians, and practicing regularly to build confidence and competence in handling and
troubleshooting equipment. Regular practice and ongoing education are essential for staying updated
on best practices and ensuring that I can handle any equipment-related challenges effectively.
In addition to training, self-directed learning through resources such as manuals, online tutorials, and
scientific literature can also be beneficial. Keeping up-to-date with the latest advancements and
techniques in laboratory practice will help me stay competent and prepared for any new challenges that
may arise.
Peer comparison:
In comparing my skills with those of my peers, I observed that many of them had a greater proficiency in
troubleshooting equipment issues. This comparison highlighted the importance of being well-versed in
