This practical offers a fun way of measuring the rate of photosynthesis, using a green alga immobilised in alginate beads.
The beads are placed in a Hydrogencarbonate indicator, which changes colour with pH. As the alga respire and photosynthesise, the concentration of carbon dioxide in the indicator solution changes, with very visible results.
These ‘algal balls’ make it easy to standardise the amount of photosynthetic tissue in any investigation, allowing students to compare a number of factors.
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Great resource. Quality assured. Good practical. Note: You can get the algae culture (Scenedesmus quadricauda) on eBay, much cheaper.
Saved lots of planning. Thanks
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