Question

Is it possible to calculate V(CO2) in this instance? If so what would the formula be for each day?

Day# Filtered? Bottle # V(Oxygen) uM V(CO2) Respiration 113.87 78.39 1 no 2 no 3 no 4 no 1 yes 2 yes 3 yes 4 yes V(thio) 16 0.25992 33 0.17931 63 0.13513 68 0.07230 0.16663 29 <detection limit 9 <detection limit 12 <detection limit 58.94 31.29 72.81 53 1. Plot oxygen concentrations for 4 days for unfiltered water. 2. Add CO2 production line to the same graph 3. Plot the respiration rate for each day. Is it consistent thoughout the experiment? If not, what could be the causes for respiration rate change? 4. Give definition of hypoxic conditions in water 5. What causes hypoxia? Is it caused by natural or anthropogenic factors? 6. Why people care about it?

Answer 1

Question 1.

The oxygen concentrations for 4 days for unfiltered water, can be plotted as shown below.

(wn) Pol 20 10 15 20 3.0 3.5 25 #day

Equation of the line: Days = -26.719*[O₂] + 137.42

The slope of the line = -26.719/uM

y-intercept of the line = 137.42 uM