Investigating light intensity as a limiting factor of photosynthesis
We can investigate specific limiting factor of photosynthesis using hydrogencarbonate indicator.
Hydrogencarbonate indicator is used to show carbon dioxide concentration in solution. The table shows the colour that the indicator turns at different levels of carbon dioxide concentration.
Concentration
Indicator turns
Highest
Yellow
Higher
Orange
Atmospheric level
Red
Low
Magenta
Lowest
Purple
Concentration
Highest
Indicator turns
Yellow
Concentration
Higher
Indicator turns
Orange
Concentration
Atmospheric level
Indicator turns
Red
Concentration
Low
Indicator turns
Magenta
Concentration
Lowest
Indicator turns
Purple
If we place different samples in different coditions we can investigate how the conditions affect photosynthesis rate by testing with hydrogencarbonate indicator.
Watch the videos below to see how these investigations can be carried out.
