Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon

A. Sodium chloride

Explanation: Sodium chloride ( is an ionic compound formed by transfer of electrons from sodium to chlorine.

Electronic configuration of sodium:

Sodium atom will loose one electron to gain noble gas configuration and form sodium cation with +1 charge.

Electronic configuration of chlorine:

Chlorine atom will gain one electron to gain noble gas configuration and form chloride ion with -1 charge.

These ions can be separated in polar solvent water and thus are soluble in water.

Whereas methane ( is a covalent compound formed by sharing of electrons and is soluble in non polar solvents.

Bromine is a covalent compound formed by sharing of electrons and is soluble in non polar solvents.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

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