What is happening, at a molecular level, when a salt dissolves in solvent. Be su

Question

What is happening, at a molecular level, when a salt dissolves in solvent. Be sure include descriptions of the intramolecular (solvent/solute) and intermolecular forces involved. A student is trying to dissolve 3.0 g of NaCI, in 5.0 mL water, at 30 degree C. The solubility limit of NaCI is 40 g/100 mL water. Will all of the salt dissolve? If not, how much salt will be left over? A 1.0 m solution of CaCI_2 and a 1.0 m solution of glucose exhibit different freezing points. Explain the difference between these solutions, and how this difference is factored into the

Explanation / Answer

Q2.

m = 3 g of NaCl

V = 5 mL

T = 30°C

limit is 40 g / 100 mL

so..

C = 40/100 = 0.4 g per mL

C wanted = 3/5 = 0.6 g per mL

then

0.6 > 0.4

so , it will NOT dilsolve

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