1. Planning 1 Starter… H/W…
Compare your findings with the people around you and discuss.
H/W…
Carry out a risk assessment and plan how you will carry out your trials
Due next week’s 1st single lesson
Review question maybe using a mind map on a white board

2. 5 week plan single lessons
Week 1 – Briefing
Week 2 – Planning
Week 3 – Planning
Week 4 – Trials for CPAC
Week 5 – Rates CPAC
If you miss a session you MUST download the PowerPoint from the shared area and collect associated materials, this is your responsibility.
You must complete all homeworks or you will not be allowed onto Y13 chemistry. No excuses

3. Task Magnesium ribbon 2 moldm-3 HCl
Access to general lab apparatus including: stopwatches, beakers, volumetric flasks, glass rods,
You will vary the concentration of the HCl

4. Risk assessment
List all the chemicals you intend to use or make. Give the approximate quantities in each case, and state whether the substance will be in pure form or in solution. If in solution, at what concentration?
For each substance, identify the hazards. State whether it is: flammable, harmful, irritant , oxidizing, explosive, toxic, corrosive , radioactive If there is a maximum exposure limit, state this also. Use the references listed below to help you. For example, you could use suppliers’ catalogues to identify the hazardous chemicals and then look up the conditions of use on the Hazcards.
Identify any hazards that may arise during the operations you will carry out – for example, there may be a highly exothermic reaction when two chemicals are mixed.
Give the safety precautions you will use when handling each of the hazardous substances, or carrying out hazardous operations.
Make sure that you include your completed Risk Assessment in the Planner form and discuss it with your teacher. Remember that if you change your plans you may need to change your Risk Assessment.

5. Trials Method Volume of HCl Concentration range Surface area Mg
Cleaning the Mg
Time / temp rise
Aim of the trials if to get repeatable results. So each condition should be trialled 2-3 times and you want the results to be similar each time

6. YOU SHOULD MAKE UP 6-7 DIFFERENT CONCENTRATIONS
Making up solutions
YOU SHOULD MAKE UP 6-7 DIFFERENT CONCENTRATIONS
Concentration
Volume 2 mol acid / cm3
Volume of water / cm3
2.0 50
1.5
37.5
12.5
1.0 25
0.5

7. Ensure that you know that your HCl is in excess
Plenary
Ensure that you know that your HCl is in excess
How will you do this?