Magnesium Chloride Is Often Used to Melt Ice on Sidewalks $\circ$

question 62

Multiple Choice

Magnesium chloride is often used to melt ice on sidewalks.Considering that the solubility of magnesium chloride (95.21 g/mol) in water is 54.3 g per 100.0 g of water,what is the lowest temperature that you would expect to be able to melt ice with magnesium chloride? Assume ideal behavior.[K_f (water) = 1.86 ^$\circ$ C/m]

• A)-41.0 \(\circ\) C
• B)-31.8 \(\circ\) C
• C)-10.6 \(\circ\) C
• D)-25.0 \(\circ\) C
• E)-29.2 \(\circ\) C

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Definitions:

Nonpolar

A type of chemical bond or molecule that does not have distinct electrical poles, resulting in even distribution of electrical charge.

Lewis Structure

A diagram illustrating the bonding between atoms in a molecule and the lone pairs of electrons that may exist.

Boric Acid

A weak, monobasic Lewis acid of boron often used as an antiseptic, insecticide, flame retardant, or in making other chemicals, represented as H3BO3.

Non-Bonding Lone Pairs

Non-bonding lone pairs refer to pairs of valence electrons on an atom that do not participate in bonding with other atoms.