Record your results of mixing different solutes and solvents. Part D; Physical F

Question

Record your results of mixing different solutes and solvents. Part D; Physical Factors Affecting Solubility Time in seconds to dissolve NH_4CI with stirring or shaking: _______ Time in seconds needed to dissolve NH4CI with heating: _______ Observation of unshaken NH_4CI at the end of the lab period: Observations of heated test tube containing a saturated solution of NH_4CI: Observations of cooled test tube containing a saturated solution of NH_4CI: Temperature (degree C) data tor dissolving NH_4CI: Temperature (degree C) data for dissolving Na_2CO_3:

Explanation / Answer

PART C:

NaCl Sugar Oil I2

H2O Yes Yes No No

CCl4 No No Yes Yes

NaCl is a salt and hence dissolves in water and doesn't soluble in organic solvents like CCl4.

Sugar (C12H22O11) is a polar covalent molecule. When it dissolves in water, the weak bonds between the carbon, hydrogen and oxygen atoms are broken. In the process, the bonds in the water molecules are also broken, and intermolecular bonds between the water and sugar molecules can then form.

Water is polar and oil is nonpolar, their molecules are not attracted to each other and hence oil is not soluble in water. CCl4 is nonpolar solvent and hence oil is soluble in CCl4.

Elemental iodine is soluble in water, but only slightly. One gram of iodine dissolves in 3,450 milliliters at 20 degrees Celsius.

PART D:

Part D are the experimental observations.

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