- Why are alkanes not soluble in water?
- Which compound is more soluble in water?
- What makes a molecule soluble in water?
- Which substance is most soluble?
- Why does branching increase stability?
- What are the 4 factors affecting solubility?
- What does solubility depend on?
- Are all alkanes soluble or insoluble in water?
- Are aldehydes soluble in water?
- How can you increase solubility?
- Is ch3ch2oh soluble or insoluble in water?
- Does branching increase melting point?
- Does branching increase boiling point?
- Why do straight chains have higher boiling points?
Why are alkanes not soluble in water?
Alkanes are not soluble in water, a polar substance.
The two substances do not meet the usual criterion of solubility: “Like dissolves like.” Water molecules are too strongly attracted to each other by hydrogen bonds to allow nonpolar alkanes to slip in between them and dissolve..
Which compound is more soluble in water?
Among given compounds, ethylene glycol ( HO−CH2−CH2−OH ) is the most soluble in water. Ethylene glycol has two hydroxy groups both of which form hydrogen bonds with water. Greater is the number of hydrogen bonds, greater is the extent of hydrogen bonding and greater is the solubility in water.
What makes a molecule soluble in water?
When polar compounds or ions are added to water, they break up into smaller components, or dissolve, to become part of the solution. The water’s partial charges attract different parts of the compound, making them soluble in water.
Which substance is most soluble?
Ionic substances are generally most soluble in polar solvents; the higher the lattice energy, the more polar the solvent must be to overcome the lattice energy and dissolve the substance. Because of its high polarity, water is the most common solvent for ionic compounds.
Why does branching increase stability?
Chemists have known for almost 80 years that branched alkanes are more stable than their unbranched isomers. … According to this model, branching means that the electronic structure is simply more compact and this decreases molecular surface area per atom and so leads to a lowering of energy and increases in stability. .
What are the 4 factors affecting solubility?
Factors affecting solubilityTemperature. Basically, solubility increases with temperature. … Polarity. In most cases solutes dissolve in solvents that have a similar polarity. … Pressure. Solid and liquid solutes. … Molecular size. … Stirring increases the speed of dissolving.
What does solubility depend on?
The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals (including changes to the pH) of the solution.
Are all alkanes soluble or insoluble in water?
Solubility. Alkanes (both normal and cycloalkanes) are virtually insoluble in water but dissolve in organic solvents. The liquid alkanes are good solvents for many other covalent compounds.
Are aldehydes soluble in water?
Solubility in water The small aldehydes and ketones are freely soluble in water but solubility falls with chain length. … The reason for the solubility is that although aldehydes and ketones can’t hydrogen bond with themselves, they can hydrogen bond with water molecules.
How can you increase solubility?
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
Is ch3ch2oh soluble or insoluble in water?
Absolutely. CH3CH2OH, known as ethanol, is an alcohol that has a very short hydrophobic chain and a hydrophilic group. With the hydrophilic group at the end (-OH) having a stronger force than the hydrophobic chain (CH3CH2-), it interacts with water and dissolves in it.
Does branching increase melting point?
Starting with the simplest branched compound, as you increase branching, you will increase the melting point, but decrease the boiling point. Why? … Boiling point is related to the forces between molecules, which in the case of hydrocarbons is Van Der Waals interactions.
Does branching increase boiling point?
Branching decreases the boiling point As the length of carbon chain increases, the surface area of the compound will also increase. Van der Waals dispersion force is proportional to the surface area. So the increase of surface area increases the ability of individual molecules to attract each other.
Why do straight chains have higher boiling points?
A straight-chain alkane will have a boiling point higher than a branched-chain alkane due to the greater surface area in contact, thus the greater van der Waals forces, between adjacent molecules.