Why do some scientists prefer to express concentrations of water contaminants in the units ppm and ppb rather than molarity?
1 answer:
Explanation:
These molarity units are used to express very small solute concentrations. Molarity cannot be used to express small amount of solute dissolved in solvents.
parts per million ppm is a dimensionless quantity that represents the part of a whole number in units of
parts per billion ppb represents the part of a whole in units of
These quantities are useful in determining very small amount of solute like gold concentration in stream sediments.
Learn more:
ppm brainly.com/question/2854033
#learnwithBrainly
You might be interested in
Answer:
The four resonance structures of the phenoxide ion are shown in the image attached
The conjugate base of cyclohexanol has only one resonance contributor, while
the conjugate base of phenol has four resonance contributors.
Explanation:
In organic chemistry, it is known that structures are more stable if they possess more resonance contributors. The greater the number of contributing canonical structures, the more stable the organic specie. Since the phenoxide ion has four contributing canonical structures, it is quite much more stable than cyclohexanol having only one contributing structure to its conjugate base. Hence the PKa(acid dissociation constant) of phenol is lesser than that of cyclohexanol. The conjugate base of phenol is stabilized by resonance.
