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Questions and Answers
What is the main purpose of identifying variables in an investigation?
What is the main purpose of identifying variables in an investigation?
A hypothesis should be a proven fact before starting an investigation.
A hypothesis should be a proven fact before starting an investigation.
False
What is the importance of graphing data in an investigation? (Answer should be around 2-3 sentences)
What is the importance of graphing data in an investigation? (Answer should be around 2-3 sentences)
Graphing data helps to visualize the results, identify patterns and trends, and make it easier to draw conclusions.
When designing an investigation to test the solubility of different chain organic molecules, it is essential to ______________ the temperature and pressure to ensure fair testing.
When designing an investigation to test the solubility of different chain organic molecules, it is essential to ______________ the temperature and pressure to ensure fair testing.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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Study Notes
Designing an Investigation for Solubility of Organic Molecules
Key Objectives
- Design an investigation to determine which of the 5 chain organic molecules has the best solubility in water
- Identify and control variables affecting the investigation
- Collect and analyze graph data to draw conclusions
- Identify and minimize safety risks associated with the investigation
Hypothesis
- A clear hypothesis should be stated, such as: "The shorter the chain length, the better the solubility in water"
Variables
- Independent variable: type of organic molecule (5 different chain lengths)
- Dependent variable: solubility of each molecule in water
- Controlled variables: temperature, volume of water, method of mixing, etc.
Data Collection and Graphing
- Quantitative data should be collected on the amount of each molecule that dissolves in a fixed volume of water
- Data should be presented in a graph, with chain length on the x-axis and solubility on the y-axis
- The graph should be analyzed to identify trends and patterns
Safety Risks and Precautions
- Handling of chemicals: wear gloves, goggles, and laboratory coats
- Spills and accidents: have a spill response plan in place, and ensure easy access to a sink and cleaning materials
- Fire hazards: keep away from open flames and heat sources
Conclusion and Application
- The investigation should lead to a conclusion about which molecule has the best solubility in water
- The findings should be discussed in relation to the molecular structure and chain length
- The implications of the investigation should be applied to molecules with bigger chain lengths, exploring how solubility changes with increased chain length
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Description
Develop a scientific investigation to determine the solubility of five different chain organic molecules in water, identifying hypotheses, variables, and safety risks. Apply findings to molecules with larger chain lengths.
