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Aim
Aim
To identify several unknown colourless liquids and inorganic solids
To identify several unknown colourless liquids and inorganic solids
A. Report & Analyse of Results
A. Report & Analyse of Results
Tabulate your results for Part 1 and Part 2.
2. Use your results to deduce which functional groups are in compounds A, B, and C?
3. Use your results to identify the inorganic solids X, Y and Z.
Learning Tip
Learning Tip
Always document results with colour changes from and to
Things to consider CPAC 4b
Things to consider CPAC 4b
CPAC 4b – Obtains accurate, precise and sufficient data for experimental and investigative procedures and records this methodically using appropriate units and conventions.
Record information in a tables or appropriately
Correctly record colour changes for organic tests from and to (must be from to!)
Correctly record colour changes for inorganic tests from and to (must be from to!)
Correctly record flame test colours.
Record positive and negative results
Understands negative results are important in identifying unknowns
Things to consider CPAC 5b
Things to consider CPAC 5b
CPAC 5b – Sources of information are cited demonstrating that research has taken place, supporting planning and conclusions
· Clearly identifies any material that is a direct quote as such.
· Use research to support their identification of organic and inorganic unknowns
· Use research to support any conclusions drawn
· Compile a bibliography of texts from which material has been sourced in such a way that the reader may retrieve the information easily.
B. Evaluate your report by answering the questions
B. Evaluate your report by answering the questions
1. State the type of organic liquid product that forms for any of the reactions that occur during tests 1 to 4.
2. Write ionic equations for the reactions of X, Y and Z in Part 2, test 2.
3. Why is nitric acid added in the test for halide ions using silver nitrate?
C. Evaluate your Practical by Completing the Form
C. Evaluate your Practical by Completing the Form
Required Resources
Required Resources
Core Practical 7 Student Evaluation.docxAS-and-A-level-Chemistry-Core-Practical-7-Inorganic-and-Organic-Unkowns-Student Worksheets.docxConsult CLEAPSS Hazcards® 84A,45C,44B,19A,98B,95A,78C,47A,87,40A,22B,6,67,91A,10A,15B. Perform a risk assessment using up-to-date information before this practical is carried out
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