Core Practical 8 Pre Lab

CPAC 2c - Identifies and controls significant quantitative variables where applicable, and plans approaches to take account of variables that cannot readily be controlled.

· Fills burette using a suitable funnel at eye level with goggles on

· Over fills burette & runs through to remove air bubble in tap

· Takes funnel out of burette before use

· Slows burette towards 30cm³ to dropwise speed to allow for precise volume to be measured

· Reads from bottom of the miniscus

· HCl put into polystyrene cup

· Cup stood in 250ml beaker (or more appropriate size) for stability

· Thermometer left in HCl for at least 3 mins to allow temperature to settle before initial temperature reading

· Powder is added in one swift movement & lid (with thermometer through it) is quickly replaced

· Thermometer is placed through polystyrene lid with lid on cup

· Reaction is stirred/swirled

· Equipment washed/changed between experiments /Dry cup is used each time

CPAC 5a - Uses appropriate software and/or tools to process data, carry out research and report findings.

• Carry out suitable research to support your planning of how to accurately determine the enthalpy change for two reactions

• Writes up a method in your own words specifying how accurate is achieved

• Use research to support choices of equipment and planning by citing in the text

CPAC 5b - Sources of information are cited demonstrating that research has taken place, supporting planning and conclusions.

• Carry out research to support your planning by writing a method to accurately determine the enthalpy change for two reactions

• Clearly identify any material that is a direct quote as such.

• Cite within text as necessary

• Compile a bibliography of texts from which material has been sourced in such a way that the reader may retrieve the information easily.