Sheet detail

Chemical reactions – Neutralisation

Author: Hana Slípková
Score:
Subject: Science,
Time needed: 20 min.
Pupil age: 12-15 years,
Product: TOGlic,
Pupil count: class (10+)
Accessories: tablets, activity Word games PLUS, Split into groups

Target

Try it!

Reinforce the content for a chemical reaction – neutralisation.

Preparation

Go to www.TOGlic.com and log in. Prepare the activity on your PC or tablet; it is not advisable to launch it from an interactive whiteboard (as the pupils would see both the directions and results). Select the Activities – Working with words – Word games PLUS option from the Start screen.

Prepare a set of the chemical element symbols using which your pupils will be able to combine  oxyacids and hydroxides. You need to make your set complete with bracket signs (both the left and right) and numbers (lower indices). For inserting the lower indices, the map of symbols should be used and respective lower indices searched (digits 2, 3 and 4).

For a prepared set belonging to this particular sample, kindly consult also Word games PLUS – My sets – Available sets – Science -> Neutralisation. You may also amend the set by overwriting an element with another one.

By clicking at the Dispatch button, send sections of the tasks to all pupil devices.

At the next stage, you will need the Splitting into groups activity, yet you will develop your set as late as during the class using the names of acids and hydroxides the pupils would be sending to you.

 

Progress

All the pupils will see the same set of letters and numbers on their devices once the activity has been sent out. The teacher gives the following task: "Use the listed element symbols, indices and brackets and try to set up as many hydroxide and oxyacid formulas as possible." A set time limit is running for all the pupils if set up previously in the activity parameters.

The pupils create formulas using the available elements, while they may apply every symbol, index or bracket repetitively. The formulas they dispatch will continuously display for the teacher in the overview of results. The teacher may check the answers, clicking at the incorrect ones to highlight them in grey. Green highlighting pops up automatically for the unique formulas (and blue for the longest ones which however does not matter in this case). The pupils go on creating until the time limit runs out or until the teacher considers the amount of the received formulas sufficient for the follow-up work.

The teacher has an option to give credit to the pupils who have developed the largest number of compounds, or, identified unique (green highlighted) compounds within the class.

Using the elements listed here, the pupils may put together e.g. the following acid formulas: H2SO4, H2CO3, H2SO3, HNO3, HNO2, H2PO3, H3PO4 , and hydroxides: NaOH, KOH, Ca(OH)2, Mg(OH)2  

Working with an error: Incorrectly created formulas may be written on the board once the activity has concluded and their correct structure and where the error has originated may be discussed with your pupils. You may use the function Select and use data, mark the incorrect formulas and transfer them to the interactive board where you have logged in with the same login name and password, using the Display on the board function.

At the next stage, use the Select and use data function and select 3 acid formulas and 3 hydroxide formulas, so that your pupils may set up pairs that together respond to the originated salt. (I would suggest selecting acid and hydroxide names alternatively which will be an advantage at the next distribution round). The teacher will transfer the selected (orange highlighted)  compounds to the Splitting into groups activity. Once the activity is dispatched, one compound is displayed on each pupil device. The teacher gives the following task: "Use the listed oxyacids and hydroxides to create pairs and set the neutralisation formulas. What will result from your compounds? Afterwards, write the formulas on the board in the correct structure, so that the mass conservation law applies,”

The pairs then present their formulas to the other pupils and identify the names of the originated salts.
You may use the Quick question activity and “Drawing” question type: The pupils may then write the formula on their tablet and send it  to the teacher. The teacher displays the selected solution for all the pupils on the board. 

 

Options

May further reactions be created using the available acids and hydroxides? (If multiple pairs of acids and hydroxides have been selected. The pupils will need to regroup.)
Replace some of the chemical substance symbols in the set one (Chemical reactions – Neutralisation  for the Word games PLUS activity) – that will result in other compounds and other salts.

Created: 19/1/2016 Last update: 24/1/2017

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