Marine Biology Lecture #18

Carbon dioxide and water combine to form what species?

• carbonic acid

• bicarbonate

• carbonate

Carbonic acid loses a proton to form what?

• bicarbonate

• carbon dioxide

• carbonate

Bicarbonate loses a proton to form what?

• carbonate

• carbonic acid

• carbon dioxide

What causes the spikes in the graph for atmospheric CO2?

• changing of the seasons

• fluctuations in the years

• variation in carbon emissions

There is approximately __ ppm

• about 400 ppm

• less than 200 ppm

• 50 ppm

• about 100 ppm

The [Ca 2+] times what gives rise to the apparent solubility product at equilibrium?

• CO3 2-

• HCO3 -

• H2CO3

Why is the reaction of CO2 and H2O in the ocean harmful?

• it increases the number of protons, decreasing the pH

• it increases the number of protons, increasing the pH

• organisms have a harder time forming CaCO3 skeletons

• calcifying organisms tend to have thinner protection