Why does sodium benzoate dissolve so well in water, whereas benzoic acid does not?

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Sodium Benzoate is a salt. Sodium salts are ionic compounds.

Sodium benzoate is an ionic compound whereas benzoic acid is a covalent compound.

Ionic compounds dissolve in water while covalent compounds do not.

Similarly ionic compounds do not dissolve in non polar solvents but covalent compounds do.

It is because of this reason that sodium benzoate dissolve so well in water, whereas benzoic acid does not

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >