Solubilty of components affect by polarity. Simlar substance
dissovle similar subtance. So polar substance dissolve polar substance and
nonpolar substance dissolves nonpolar substance. Since water is polar and
carbon tetracholride are non polar
Br2 dissolves in carbon tetracholride because it is non
KF in water because it is polar
CH2O in water because it is polar
C6H14 is carbon tetracholride because it is non polar
Among the choices, the better solvent would be water because it is the universal solvent. However, this would still depend on what type of solute you have. Water is considered as a universal solvent since
most substances dissolve in water. And comparing it to other liquids, it is the
one who dissolves a wide range of substances.
For each solute, identify the better solvent: water or carbon tetrachloride. C6H6, I2, Na2S, CH3OH
water → CH3OH and Na2S
Carbon tetrachloride → C6H6 and I2
To determine whether a solvent will dissolve a solute one need to know the polarity of the solvent and the solute. It is a known fact that polar solvent will dissolve polar solute while non polar solvent will dissolve non polar solute.
Water is a polar solvent so, it will dissolve most polar solute . carbon tetrachloride is a non polar solvent, it will dissolve non polar solute.
C6H6 is a non polar solute so it will definitely dissolve better in carbon tetrachloride.
I2 is a non polar solute therefore, it will dissolve better in carbon tetrachloride.
Na2S is a polar solute it will definitely dissolve better in water.
CH3OH is a polar solute it will dissolve better in water.
In water solvent:
Na₂S and CH₃OH
In carbon tetrachloride solvent:
C₆H₆ and Br₂
Using : Like dissolves like
Polar substances dissolve in polar and non polar substance in non polar.
Since water is polar and carbon tetrachloride is non polar.
Na₂S, sodium sulfide is an ionic compound and thus it best dissolves in a polar solvent which is water.
C₆H₆, benzene is non polar and dissolves in carbon tetrachloride.
CH₃OH, methanol which is polar and dissolves in water.
Br₂, bromine gas is non polar and dissolves in carbon tetrachloride.
The better solvent for Na₂S (Natrium sulfide)and CH₃OH(methanol): water
The better solvent for C₆H₆(benzene) and Br₂(bromine) : CCl₄
In covalent bonds there are differences in electronegativity which causes polarization of the bonds
If the bond in an electron pair is more attracted to one atom, then the covalent bond is polar
This is due to the electron attraction of one atom which is bigger than the other atoms
But the geometrical shape of molecules can make molecules that have polar bonds can be polar or non-polar
The symmetrical shape of the molecule is usually a non-polar molecule
For example on H₂O
This molecule is polar because of the difference in electronegativity where the O atom has a stronger electron attraction when compared to the H atom, so this molecule have positive and negative poles where the negative pole is on the O atom
Polar molecules dissolved in water undergo ionization so they can conduct electricity and are electrolyte, while non-polar molecules are non-electrolyte.
Polar molecules will dissolve polar molecules and vice versa non-polar molecules can dissolve non-polar molecules.
So water molecules that can be used to test polar and non-polar molecules by dissolving them in water
The size of polarity is usually indicated by the magnitude of the dipole moment
The greater the dipole moment, the more polar the compound is. In non-polar compounds the dipole moment is zero.
water- H₂O is a polar solvent, due to the large electronegativity between O and H atoms, and the shape of the V molecule (asymmetrical)
CCl₄- Carbon tetrachloride is a nonpolar solvent, where C atoms as central and Cl atoms have different electronegativity but because of the symmetrical shape so that the dipole moment is removed and so it is nonpolar
Let see that each of these compounds is polar or non-polar
Na₂S (Natrium sulfide)and CH₃OH(methanol) are ion compounds that can dissolve in polar solvents such as water
C₆H₆(benzene) and Br₂(bromine) are non-polar covalent compounds with symmetrical shapes and do not have free electron pairs that can dissolve in CCl₄
type of chemical bond
Keywords : chemical bond, covalen bond, water, electrons, dipole moment
Do you mean which one out of water and carbon tetrachloride
if so it will be water
NH3 = water (it is actually a water soluble gas)
C6H14 = CCl4 (C6H14 won’t mix with water at all)
Na2S = water (Na2S is a salt. Salts dissolve best in water)
Br2 = CCl4, but it will also dissolve in water.
To know which is a better solvent between the two, one should know what will be the solute. It really depends on what type of solute you have. If the solute is polar then water is the better solvent for that type of solute. However, when the solute is a nonpolar substance then carbon tetrachloride is the better solvent.