Ib Chemistry Lab Report Format Text

Jonathan Friesen - Writing Coach

Ib chemistry: lab report format writing good lab reports is very important in ib as they make out a big part of your final grades in the science subjects. The key to writing a good lab report is to find out what is asked for and include all those parts in your report. Here are some steps to follow: introduction

    first you should give the aim of the investigation.

    If the teacher states the aim you shouldn’t just copy that down, you need to change it to get a full score.

    second, you need to write the hypothesis and prediction of the investigation. The hypothesis needs to be very clear, giving an exact and complete description of what might happen and why. The prediction is written like: if …then…
    you can also give a general background to the study if you feel like it’s relevant and necessary.

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    the independent variable is the one that you alter throughout your experiment. For an example, if you investigate the effect of temperature on yeast fermentation, then the different temperatures that you use are the independent variable. Using the yeast example, the dependent variable would be the amount of co2 produced by the yeast this shows how well the fermentation is going.

    the controlled variables are the ones that you try to keep constant throughout your experiment so that they don’t affect your experiment. If investigating the effect of temperature in yeast fermentation, the controlled variables would be the amount of yeast and water, the time for fermentation, etc.
materials and methods
    first give a list of all the equipment used in the experiment. Give the size of beakers/measuring cylinders, etc, used, give the names of any chemicals that are used in the experiment.

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    you can use a diagram picture to show the experimental set up if you find it necessary. Not written as a guide on how to carry out the experiment again, but rather, how you did it. Write how the independent variable was varied. using the yeast example, the independent variable can be varied by placing the fermentation tubes in hot water baths of different temperatures.
    write how changes of the dependent variable were monitored. you should write how you got your results, e.g. By reading from the scale on the fermentation tube to see how much co2 that has been produced.
    write how the controlled variables were controlled. using the yeast example, you write that you made sure that the amount of yeast used in each fermentation tube was the same because you used a scale , that you used a watch to make sure that the time that the tubes were allowed to ferment was the same for all tubes.

    write how you made sure that the sufficient relevant data was recorded. If you had several trials, if you used controls, methods of measurements, if your calculations are correct, etc. The tables should be numbered and have captions in which you briefly describe the contents of the tables and how you recorded the results. You don’t have to discuss the significance of the results to the aim of the investigation.

data processing and presentation
    the data should be processed calculated correctly and presented in tables as above and graphs. If you use graphs, they should have a caption in which you describe the contents of the graph. The axes of the graphs have to be labelled with units and the points have to be plotted correctly. For hl: error analysis should be carried out if possible calculate the percentage uncertainty, etc.

conclusion
    in the conclusion you should discuss the results you obtained in relation with your hypothesis.
evaluation/discussion
    in the evaluation you should evaluate the method used. Write about the main weakness of the method used and the weakness in the method of manipulation of data. Suggest real improvements that can be carried out in the school lab to the investigation. Discuss further investigations that are of interest and can be carried out and new questions that could be posed.   reinforcement of scientific methods and assessment of communication are the main reasons for using a report.

                abstract a if assigned                clearly state the goal, briefly explain the experiment, relate the results, and draw appropriate conclusions.                clearly summarize all elements in one paragraph word count: _ i.            background information bi if assigned                explanation of observations, information given in class, or other research/information that led you to your question.            design d question / hypothesis / variables                define problem / research question i.               provide a focused problem/question no y/n questions! ii.

                  make a single sentence prediction of outcome of experiment no personal references! no i think/believe… ii.                describe factors to have an effect on experiment i.             constants                list materials/equipment.

      labeled diagrams/photos are encouraged                describe steps taken to manage variables.                describe in numbered statements the steps that were taken during experiment mention any adjustments made.                make clear how and what is being measured include units.                if applicable, clearly detail control setup standard of comparison.

                   procedure should be sufficiently clear so that anyone can repeat experiment and get the same results.             data collection and processing dcp                observation and record of raw data usually handwritten and dated.                include both quantitative and qualitative data.