Traditional measuring apparatus such as burettes and measuring cylinders may be inaccessible for a student with vision impairment. Coloured dyes can be added to solutions to increase contrast. But if this is not helpful, it is possible to create simple and cheap notched syringes. A series of notched syringes of different volumes can enable a student with vision impairment to independently carry out a titration.

Making the notched syringes (for teachers/technicians)

Pull the plunger on the Leur slip syringe up until the base of the plunger is level with the intended volume for the notched syringe.

Cut a notch with a scalpel so that the bottom of the notch is in line with the top of the barrel.

Add adhesive rubber bumps (Bumpons) to label the volume that the notched syringe measures.

Using the syringes

Fill the syringe with liquid from the beaker containing the reactant until it is at its maximum capacity.

Place a finger on the notch and push it down until the bottom of the notch is in line with the top of the barrel, expelling the liquid back into the same beaker.

Transfer the liquid remaining in the syringe into the reaction vessel.

Video to demonstrate using the syringes

 

Page author: Rachel Chataway-Green

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