Monday, 26 October 2015

Chemistry IA

The Chemistry IA

So each Chemistry HL or SL student is required to do the Chemistry Internal Assessment. This assessment is internally graded but is externally moderated by the IB. You can think of the IA as what you get when you combine the Extended Essay with a standard lab report. 

So the method for choosing the IA topic is similar to the EE. You need to think of something chemistry related which bothers you in the world and that you want to investigate. 
A good IA should include:
  1. Research Question - A clear, concise research question should be included
  2. Introduction - Summary of investigation, Research Question, Summary of results
  3. Background Information - What is the chemistry in what you're doing. Describe what you already know and hence what hypothesis you can make 
  4. Data Collection - Here you show what data you initially got while doing the data
  5. Data processing - With the raw data you have, do the required calculations to find the final result for what you are investigating
  6. Conclusion - Summarise the results with required graphs and tables
  7. Evaluation - What real world impact does your finding have. What can we learn from your conclusion
After this, the IA  is graded based on the following components

Practical (Internal) Assessment 2016 exams
Personal engagement
This criterion assesses the extent to which the student engages with the exploration and makes it their own.
Personal engagement may be recognized in different attributes and skills. These could include addressing personal interests or showing evidence of independent thinking, creativity or initiative in the designing, implementation or presentation of the investigation.
MarkDescriptor



2The evidence of personal engagement with the exploration is clear with significant independent thinking, initiative or creativity.
The justification given for choosing the research question and/or the topic under investigation demonstrates personal significance, interest or curiosity.
There is evidence of personal input and initiative in the designing, implementation or presentation of the investigation.


5-6The topic of the investigation is identified and a relevant and fully focused research question is clearly described.
The background information provided for the investigation is entirely appropriate and relevant and enhances the understanding of the context of the investigation.
The methodology of the investigation is highly appropriate to address the research question because it takes into consideration all, or nearly all, of the significant factors that may influence the relevance, reliability and sufficiency of the collected data.
The report shows evidence of full awareness of the significant safety, ethical or environmental issues that are relevant to the methodology of the investigation.
* This indicator should only be applied when appropriate to the investigation.
5-6   The report includes sufficient relevant quantitative and qualitative raw data that could support a detailed        and valid conclusion to the research question.
Appropriate and sufficient data processing is carried out with the accuracy required to enable a         conclusion to the research question to be drawn that is fully consistent with the experimental data.
The report shows evidence of full and appropriate consideration of the impact of measurement           uncertainty on the analysis.
The processed data is correctly interpreted so that a completely valid and detailed conclusion to the       research question can be deduced.



5-6A detailed conclusion is described and justified which is entirely relevant to the research question and fully supported by the data presented.
A conclusion is correctly described and justified through relevant comparison to the accepted scientific context.
Strengths and weaknesses of the investigation, such as limitations of the data and sources of error, are discussed and provide evidence of a clear understanding of the methodological issues involved in establishing the conclusion.
The student has discussed realistic and relevant suggestions for the improvement and extension of the investigation.
communication of the focus, process and outcomes.

Exploration
This criterion assesses the extent to which the student establishes the scientific context for the work, states a clear and focused research question and uses concepts and techniques appropriate to the Diploma Programme level. Where appropriate, this criterion also assesses awareness of safety, environmental, and ethical considerations.
Analysis
This criterion assesses the extent to which the student's report provides evidence that the student has selected, recorded, processed and interpreted the data in ways that are relevant to the research question and can support a conclusion.

Evaluation
This criterion assesses the extent to which the student's report provides evidence of evaluation of the investigation and the results with regard to the research question and the accepted scientific context.
Communication
This criterion assesses whether the investigation is presented and reported in a way that supports effective


3-4The presentation of the investigation is clear. Any errors do not hamper understanding of the focus, process and outcomes.
The report is well structured and clear: the necessary information on focus, process and outcomes is present and presented in a coherent way.
The report is relevant and concise thereby facilitating a ready understanding of the focus, process and outcomes of the investigation.
The use of subject specific terminology and conventions is appropriate and correct. Any errors do not hamper understanding.
*For example, incorrect/missing labelling of graphs, tables, images; use of units, decimal places. For issues of referencing and citations refer to the "Academic honesty" section.

Criterionmarks available
marks
Personal Engagementmaximum 22 marks
Explorationmaximum 66 marks
Analysismaximum 66 marks
Evaluationmaximum 66 marks
Communicationmaximum 44 marks
 
Total =
24 marks

Source: http://ibchem.com/IB/ibe/criteria.htm




Monday, 3 August 2015

Tips for Extended Essay in Chemistry

Every IB student is required to write a four thousand word essay in a subject of their choice. Some of you might choose to do a 4000 word exploration in the interesting subject of Chemistry. Now, to do this one needs to think of a specific area of chemistry one is really connected with. I think the best Extended essay ideas are found when one looks into their own life and see how they can apply Chemistry to it.

There are several sites which provide ideas for Extended Essays/ IAs. However, if you use such sites you run the risk of choosing an unoriginal topic because most of your peers will be referring to the same sites. I leave a link to one of them down below

Another thing to keep in mind is to find an experiment that can be easily conducted in your school. Sometimes the Chemistry laboratory may not have the proper equipment to conduct the experiment you have in mind. Hence, it is very important you decide the procedure quickly and show it to your Extended Essay supervisor

Another helpful thing to do is to look at past Extended essays in Chemistry and see the marking scheme. The good thing about doing an Extended Essay in a science subject is that as long as you follow the correct format, you will get a good grade. I will put a link to the criteria in the description.

These are the main tips I can give. Ask any questions you may have in the comments. It is however useful to keep in mind that only 3% of the world gets an A on doing their Extended Essay in a group 4 subject

http://www.hhscougars.org/ourpages/auto/2014/3/11/51232681/2_EE_AssessmentCriteria.pdf

http://seniorchem.com/eei.html

Tuesday, 30 June 2015

Recrystallisation procedure and requirements

Recrystallisation

Introduction: Recrystallisation is a simple procedure in which we can separate a water soluble pure compound from insoluble impurities

Requirements 
  1. Porcelain bowl
  2. Bunsen burner
  3. Wire gauze
  4. Water soluble salt 
  5. Water  insoluble impurities
  6. Weighing balance
  7. Stirrer
  8. Filter Paper
  9. Funnel
  10. Conical flask

Procedure
  1. Take a fixed mass of pure water soluble compound in the porcelain dish
  2. Add a fixed mass of insoluble impurity
  3. Mix thoroughly
  4. Add water
  5. Stir properly to make sure all the soluble salt dissolves
  6. Next, heat the porcelain dish over a bunsen burner taking care to put a wire gauze between the dish and the flame
  7. When the mixture starts boiling pour it through the filter paper (which has to be placed in the funnel) into the conical flask
  8. If you still see traces of the impurity repeat step  6 and 7
  9. Keep doing so until you get a clear filtrate 
  10. Next cool the solution until crystals form
  11. Collect the crystals and weigh them 
  12. Compare it to the original mass

Tuesday, 16 June 2015

Group 4 project

Recently, in school we had our Group 4 project. The project combines all the subjects of the group 4 of the IB diploma. You perform the project along with your peers who have taken different group 4 subjects. It is a required part of the IB Diploma.

So, initially you will be given an overarching topic to do the project on. In our school the overarching topic was "water". This is quite a relevant and interesting topic considering the crisis of water shortage. Hence, it is quite easy to take international mindedness into consideration while performing a project on this topic. Then you have to choose a topic under this broad topic. For example, my group decided to do "water in an industry".

The next step in the Group 4 project is to decide which experiments to perform in each subject. Each experiment must be linked to your topic and have some real world significance. Also, every member of the group should  be familiar with each experiment in every science. This means a Biology student should have thorough knowledge and an Environmental Studies student should be able to answer any question about the Chemistry experiment. The beauty of the Group 4 project is that you end up learning a bit about each and every science. In fact, our school had a session in which we learnt basic experimental skills in each science and I recommend any teacher reading this to do the same for his/her student as I found this very useful in integrating all the sciences.

At the end of the Group 4, you will need to write a reflective statement which is digitally sent to the IB. It is only 50 words and you should sum up your experience. Here is a sample reflective statement:

"The topic for our group 4 this year was water and my group’s topic was water in an industry. The group 4 project was an amazing experience and I learnt a lot about Physics, Chemistry, Biology and ESS."

P.S. For this project, I performed recrystallisation and in my next post, I will include the procedure and pictures for a recrystallisation experiment.