This page holds a finished CHEM-120 Week 3 polarity and solubility explanation, running from an uneven bond to a whole-molecule verdict to what happens when the compound meets a solvent. Searches like "chem 120 week 3 assignment example", "chem120 week 3 sample" and "chem-120 week 3 example" land here.
What a finished CHEM-120 Week 3 polarity and solubility explanation looks like
Roughly a page, often under two or three short headings the classroom supplies. It starts at the bond: which atom pulls harder on the shared pair and how big the gap between them is. Then the molecule as a whole, because a compound can hold several uneven bonds and still come out balanced if they point against each other, and the finished example says which case it is. Next the partner, named rather than implied, water in most assignments and a fat or an oil in the rest. The prediction follows, written as an outcome someone could check: dissolves, stays as a separate layer, forms a cloudy suspension. A closing line ties the answer back to something the course has already measured.
How a CHEM-120 Week 3 example is structured
Bond, molecule, partner, outcome, in that order, and the order is the argument. Starting at the bond forces the explanation to name atoms instead of asserting a category. The whole-molecule step is the one drafts skip: geometry decides whether several uneven bonds add up or cancel, and a symmetric arrangement can leave a compound with polar bonds behaving as though it had none. Only then does the solvent enter, and it enters as a named liquid with its own character rather than as a background. The outcome is stated in a form that could be wrong, which is what makes it worth writing. Where the assignment supplies two candidate solvents, the example commits to one and says what the other would have done. A last line names the property this predicts, a boiling point, a melting point, a layer.
Start at the bond, not the label
Which atom pulls harder on the shared pair, and by how much. An answer opening on a category has skipped the evidence and will be marked as having skipped it.
Then judge the whole molecule
Uneven bonds can point against each other and cancel. A compound holding several of them can still behave like a hydrocarbon, and the finished answer says which case it is.
Name the liquid
Water, an oil, an alcohol. A solubility claim with no partner named cannot be checked by anyone, and an unverifiable claim collects nothing wherever the rubric weighs it.
Between molecules, not inside them
What holds a molecule together and what holds two of them near each other are separate questions. Mixing them is the error this week is built to expose.
End on something visible
Dissolves, forms two layers, boils higher than its mass alone would suggest. The answer finishes at an outcome somebody could see rather than at a restatement of the category.
Where marks go in CHEM-120 Week 3
The answer that never comes back clean says polar and then says dissolves, with nothing in between about what the water molecules are doing at the surface of that compound. Judging the whole molecule from a single bond is the next block of points, since geometry can cancel two uneven bonds and leave a compound behaving like a hydrocarbon. An explanation that never names the liquid follows, because a prediction with no partner cannot be checked. Mixing up what holds one molecule together with what holds two of them near each other costs a little wherever it appears. Lower down: a solubility claim with no temperature where the assignment supplied one, a boiling point explained by mass alone when hydrogen bonding was the whole story, and soluble written as though it meant completely.
Get a CHEM-120 Week 3 example written to your instructions
Send the compound or the pair of solvents your section named, the assignment page and any rubric rows attached to it, and a finished explanation comes back inside 24-48h running from the bond through the molecule to the outcome. The first one is free, written around your own assignment rather than a generic pair.
CHEM-120 Week 3 questions, answered
Is polarity a yes or no question?
It is a matter of degree, and answers treating it as a switch run into trouble on compounds sitting in the middle. A short chain alcohol mixes with water in every proportion; add carbons and the same functional group stops being able to carry the molecule. The finished example says where on that range the compound sits and why.
Do I need numbers for electronegativity?
Where your section supplies a table, use it and cite it, since a difference quoted from memory is unverifiable. Where no table is supplied, the relative statement carries the answer: oxygen pulls harder than carbon, nitrogen harder than hydrogen. What loses points is a number with no source and no role in the argument that follows.
What if the compound dissolves in neither solvent?
Then that is the answer and it is worth more than a forced one. A large molecule with a small polar group and a long hydrocarbon body resists both, and saying so, with the reason given on each side, shows the two halves were weighed. An answer that forces the compound into one column loses more than one admitting it sits between.