Which of the following substances would you expect to dissolve in water?

Question

a) HCl

b) CH3OH

c) CH3CH2OH

d) Hg

e) C6H6

Answer 1

a) hydrogen chloride gas will dissolve in water

b) Methanol is soluble in water

C) ethanol is soluble in water

d) Mercury is insoluble in water

e) benzene is insoluble in water (only 1.79 g/L (25 °C) will dissolve)

Answer 2

Lancenigo di Villorba (TV), Italy

THE ANSWER ARE LETTER a, b and c.

The most general criterion of solubility of some stuffs in a defined solvents interests their INTERMOLECULAR FORCES or BONDS.
In a former place, I describe the forces interacting between the solvent's molecules.
In the water's case, these forces are mainly named as "Hydrogen bonds" that are forces interesting "PROTIC" hydrogen's atoms and other very electronegative ones (see Pauling's Electronegativities). The "Protic" hydrogen's atoms are someones interested by these forces must be directly bound to very electronegatives ones ; the other atoms interacting in these bonds must be very electronegatives.
The same condition I find when the stuff have "Protic" hydrogen atoms.
In a second place, it exist also water-soluble stuffs having NOT "Protic" hydrogen atoms but showing appreciable "Dipolar Momentum".
In a third place, I remember that Organic Stuffs having a low MOLECULAR WEIGHT are probably more water-soluble than those having HIGH's one....but this is not a clear rule.

I hope this helps you.

Water is a very polar solvent since it may dissolve the stuffs characterized by a similar nature on the basis of these stuffs form intermolecular bonds analogous to water's ones.

Answer 3

The first three will. Hg definetly won't but benzene is temperature dependant.

Also, for HCl, it is dissolving, but for CH3OH, CH3CH2OH and C6H6, it's not dissolving, it's miscibilty.

Answer 4

Well it will definitely be HCl. Because HCl is a strong electrolyte that it dissociated almost 100% in water to become H+ and Cl- Ions. Where as for CH3OH and CH3CH2OH is definitely not because they are organic com and most hydrocarbons doesn't dissociate completely in water because they are mostly nonpolar while water is polar. Hg itself is liquid in room temperature, how can we say it dissolves in water? For C6H6 it is hydrocarbons and most hydrocarbons doesn't dissociate well in water, because they are mostly hydrophobic especially when the C atom is present in a large number.So the answer is HCl

Answer 5

the substances a) b) c) are polar substances and are soluble in water

Hg is insoluble in water

C6H6 benzene is apolar and not soluble in water

Answer 6

a/b/c...all the substances that are polar ...like dissolves like

Answer 7

HCl
its ionic and can split into ions