Experiment #10: Solubility Of Organic Compound
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It is the chemical behavior of a compound depends on the type of bonds present in the molecule
Solubility
* TRUE OR FALSE: Standard Chemical Tests for the different functional groups have been developed to be carried out easily and quickly
TRUE
What are the signs that a compound is positive?
• Change in Color • Evolution of Gas • Development of Odor • Formation of Precipitate • Changes in Color of Litmus Paper
It is the first step in identification of functional groups
Solubility Test
TRUE OR FALSE: Organic compounds are grouped according to their solubility in water, ether, 5% NaOH, 5% NaHCO, 5% HCl, and Concentrated H2SO4
TRUE
TRUE OR FALSE: Solubility can be expressed as g solute/200mL solvent at a specific temperature
FALSE; it can be expressed as g solute/100mL solvent
What are the factors that can affect the solubility?
• Nature of Solute and Solvent • Temperature • pH level
What is the solubility of acetic acid in water?
Soluble (Miscible)
What is the reason why acetic acid is soluble?
Hydrophilic end forms H-bond with water
What is the solubility of acetic acid in ether?
Insoluble
What is the solubility of benzoic acid in water?
Insoluble; because its carbon is greater than 5
What is the solubility of acetic acid in pet ether?
miscible
What is the solubility of sodium benzoate in water?
Soluble; because of ion-dipole interaction
Is cyclohexanol miscible in water?
NO; it is immiscible
What is the solubility of sodium benzoate in ether?
Insoluble; non-polar, no charges
Is glucose in water soluble?
YES; because it is polyhydroxylated, making it completely solvate
What is the solubility of glucose in ether?
Insoluble; because it has many hydroxy and ether is non polar while glucose is polar
Is cellulose in water insoluble?
YES; because it is a polymer
Is cellulose in ether soluble?
NO; it is insoluble because it has many hydrophilic portions (non-polar)
TRUE OR FALSE: If there are more hydrophilic portions, there is a higher solubility in polar solvent
TRUE
TRUE OR FALSE: If there are more hydrophobic portions, there is a higher solubility in organic solvent
TRUE
TRUE OR FALSE: If there is a high degree of branching and Weak IMFA of solute, there is a low solubility in solvent
FALSE; there is a high solubility in solvent if there is a high degree of branching and weak IMFA of solute