<Tr> <Td> Sodium </Td> <Td> 1.08 </Td> <Td> Bromide </Td> <Td> 0.0067 </Td> </Tr> <Tr> <Td> Magnesium </Td> <Td> 0.1292 </Td> <Td> Carbon </Td> <Td> 0.0028 </Td> </Tr> <Tr> <Td> Vanadium </Td> <Td> 1.5 × 10--3.3 × 10 </Td> </Tr> <P> Seawater contains more dissolved ions than all types of freshwater . However, the ratios of solutes differ dramatically . For instance, although seawater contains about 2.8 times more bicarbonate than river water based on molarity, the percentage of bicarbonate in seawater as a ratio of all dissolved ions is far lower than in river water . Bicarbonate ions also constitute 48% of river water solutes but only 0.14% of all seawater ions . Differences like these are due to the varying residence times of seawater solutes; sodium and chloride have very long residence times, while calcium (vital for carbonate formation) tends to precipitate much more quickly . The most abundant dissolved ions in seawater are sodium, chloride, magnesium, sulfate and calcium . Its osmolarity is about 1000 mOsm / l . </P>

What dissolved chemical occurs in the greatest amount in ocean water