Add conslusion slide and references to powerpoint for Science Course

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Experimental Design
Experimental design is the manner in which a scientific study is to be carried
An experiment is aimed at analyzing data and determining outcomes.
To conduct a valid scientific experiment whose results are acceptable one
must use a standard experimental design.
The experimental design employed determines the validity, reliability and
replicability of the results obtained.
The design used helps the scientist conduct the study in a systematic manner
thus ensuring all aspects of the research are considered.
Experiment: Determining the iron content in
froot loops cereal.
Iron is one of the key nutrients needed by the body since it forms part of
hemoglobin which deals with gaseous exchange in the body.
Foods rich in iron are recommended so as to prevent cases of anemia due to
iron deficiency.
In this experiment the iron content in froot loops cereal will be determined.
Equipment required
200g of froot loops cereal
A bowl
A pestle
0.1M potassium thiocyanate(KCSN)
2M hydrochloric acid
Data collection and presentation
Data will be collected via direct observation.
It will be presented in tables, graphs and charts which will enable data
The control test will be measuring the amount of iron in a sample of iron
sulphate which has a known iron mass of 2 grams.
Crush the froot loops cereal in a bowl using the pestle.
Add the crushed cereal into 500ml of 2M HCl.
Filter the substrate from the mixture.
Mix the mixture with KSCN.
Use spectrophotometer to measure the absorbance of the resulting reddish
brown liquid.
Use the absorbance to calculate the iron concentration.
Crushed froot loops
The KSCN and HCl
mixture forming a
reddish brown
Spectrophotometry to
determine absorbance

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