Final Flashcards
What nutrients do phytoplankton need?
Nitrates, phosphates, and silica.
Define colorimetry.
Light measurement.
- quality: what type/color
- quantity: how much
What does turbidity measure?
Water clarity. In FTUs.
What blank did we use when measuring turbidity?
DI water
What is actually being tested when doing a titration?
The volume of a chemical to produce a color change.
Define salinity.
Total dissolved solids in water.
Define conductivity.
How easily electricity runs through a substance.
Higher salinity = ? Conductivity
Higher
What is the salinity of ocean water?
35ppt
What is the indicator solution in a chloride ion titration?
Potassium chromate (KCrO4)
What is the titrant?
Silver nitrate (AgNO3)
The red color in a chloride ion titration is what?
Silver chromate
How do you calculate D.O concentration?
Average x 2
What level of DO is considered active? Lazy?
7-8ppm
3-4ppm
No brown color = ?
No oxygen!
