This achievement standard involves investigating and classifying chemical reactions by carrying out observations and using equations.

This assessment activity requires you to comprehensively investigate four different types of chemical reactions in a total of 6 periods. You will also have up to 6 periods of class time to carry out some trial chemical reactions. This will be done during the last 3 weeks of term. 

Your teacher will provide you with all necessary lab equipment and chemicals (when you need them) as well as more detailed instructions for each practical task, including how to prepare an insoluble compound through precipitation.  

Practical tasks may be undertaken in small groups.

 All written work must be completed individually. 

It is worth 4 Credits.

So this is what the assessment actually looks like (your teacher will provide you with a paper copy)

But don't go starting it yet - you'll have several periods for you to trial the chemical reactions to prepare you for the actual assessment = to familiarise yourself with the tasks you need to be doing.

This the is what first task of the the assessment will be asking you to do:

This assessment activity requires you to comprehensively investigate four different types of chemical reactions

Task 1

• Consider the six reactions you are being asked to undertake and predict the product of each reaction including which are precipitates. The solubility rules should be considered. 

• Complete word equations for what you believe each reaction to be. 

So what different types of reactions are there? What are the solubility rules? (The reactivity series will be useful too - Whats that?)

Step 1 : Have a look as the different types of reactions are clarified - pay close attention to the letter equations ie A + B ..... etc (Learn)

Step 2 : Now for the solubility rules (see if you can remember which reaction type these are - yes = great, no = better re-watch the last video clip.) (Learn)

Step 3 : Here's a reminder about what reactivity series is all about (see if you can remember which reaction type these are - yes = great, no = better re-watch the first video clip.) (Learn)

Step 4 : What about spectator ions - watch them in action - or not. Are they watching you? (Learn)

Mission 1 : Time to practice - your teacher will supply you with the following practice sheet. You need to fill out the first page - use what you have learnt from the videos and your own research.

You need to show the first page done before moving on the actual chemical reactions. (Learn) (Create) (Share)

Step 5 : Have you have successfully completed Mission 1 (?) and have had your work checked by your teacher?  (Learn) (Create) (Share)

No ! = you will have to go and complete what you haven't yet done to be fully ready to move on.

Yes = ready for your next Challenge .... 

Challenge 1 : Now its time to do some chemistry ..... BUT ...... before you begin you need to fill in the second page of the practice sheet:

Considering the six reactions you are to undertake predict what the product of each will be and

write word equations for these. 

Also predict which you believe will be precipitation reactions and what the precipitate will be. 

Explain what you have based these predictions on.

Step 6 : Have you have successfully completed Challenge 1 (?) and have had your work checked by your teacher?  (Learn) (Create) (Share)

No ! = you will have to go and complete what you haven't yet done to be fully ready to move on.

Yes = ready for your next Challenge .... 

Challenge 2 : Now that you have had your predictions and equations checked you can collect the equipment and chemicals from your teacher and carry out the actual chemical reactions. DO they react as you predicted? (Learn) (Share)

Mission 2 : Practice time is over = time to do Task 1 of your assessment. (Learn) (Share)

Task 1

• Consider the six reactions you are being asked to undertake and predict the product of each reaction including which are precipitates. The solubility rules should be considered. 

• Complete word equations for what you believe each reaction to be. 

These chemical reactions are: 

1. Mixing silver nitrate and sodium chloride solutions 

2. Heating copper carbonate powder 

3. Mixing barium nitrate and sodium sulphate solutions 

4. Adding zinc to lead nitrate solution 

5. Heating iron with sulphur 

6. Adding magnesium to copper sulphate solution 

You are just Predicting not doing - make the most of the resource page you are supplied with.

Step 7 : Have you have successfully completed Mission 2 (?) and have had your work checked by your teacher?  (Learn) (Create) (Share)

No ! = you will have to go and complete what you haven't yet done to be fully ready to move on.

Yes = ready for your next Mission .... 

Mission 3 : Now you are ready for Task 2 = doing some chemistry and observing what actually happens. (Learn) (Create) (Share)

Task 2

• Complete each of the six practical tasks as instructed by your teacher. 

• For each reaction make comprehensive notes outlining briefly 

  1. what you did 

  2. what you observed

  3. what the final product of the reaction was. 

• Include a balanced symbol equation for each reaction. 

• Classify each reaction as, a combination, precipitation, decomposition or displacement reaction.  

Step 7 : Have you have successfully completed Mission 3 (?) and have had your work checked by your teacher?  (Learn) (Create) (Share)

No ! = you will have to go and complete what you haven't yet done to be fully ready to move on.

Yes = ready for the Final Mission .... 

Final Mission : Now take the information form your predictions in Task 1 and your observations in Task 2 put it all together and :

Task 3

• Write a comprehensive description for each of the types of reactions. In each of the descriptions, discuss the reactants and the products, including referring to the solubility rules in your explanations. Make sure you link your observations and the key chemistry concepts (Hint - go and look at Step 1 again) related to the four types of reactions including the equations and your classification of each. 

Challenge 3 : Now use the marking guide to check over your work = have you completed everything?

If not - use the time to properly complete it before doing Step 8.

Step 8 : Have you have successfully completed the Final Mission  (?) and have had your work checked by your teacher?  (Learn) (Create) (Share)

No ! = you will have to go and complete what you haven't yet done to be fully ready to move on.

Yes = Time to hand in your work.