Week 1 Sapling Homework #10

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Shannon Moore 2L
Posts: 94
Joined: Wed Feb 26, 2020 12:17 am

Week 1 Sapling Homework #10

Postby Shannon Moore 2L » Sun Oct 11, 2020 9:30 pm

For the 2-butanone 1-bromopropane magnesium reaction, I googled each of the reactant/product formulas so I could have the reaction written out for my homework.
I was just wondering why the product has no bromine nor magnesium in it?

Aliya 1H
Posts: 119
Joined: Wed Sep 30, 2020 9:34 pm

Re: Week 1 Sapling Homework #10

Postby Aliya 1H » Sun Oct 11, 2020 9:46 pm

In this problem the bromine and magnesium were probably omitted because bromine wasn't the limiting reagent and we didn't need it for the question it asked so I think they just left it off/left the reaction incomplete.

Natalie Do 3F
Posts: 120
Joined: Wed Sep 30, 2020 10:03 pm

Re: Week 1 Sapling Homework #10

Postby Natalie Do 3F » Sun Oct 11, 2020 10:10 pm

Bromine and Magnesium are effectively waste products in this equation. I think they're trying to see if we can understand limiting reactants more abstractly which is why the format of the question is so weird with the pictures and the incomplete products. It was a tough one!

Jaclyn Schwartz 1I
Posts: 101
Joined: Wed Sep 30, 2020 9:45 pm

Re: Week 1 Sapling Homework #10

Postby Jaclyn Schwartz 1I » Sun Oct 11, 2020 11:58 pm

My TA said not to worry about it. She said it was a poorly set up question but we did not have to worry about those parts

SophiaBarden 2E
Posts: 94
Joined: Wed Sep 30, 2020 10:07 pm

Re: Week 1 Sapling Homework #10

Postby SophiaBarden 2E » Thu Oct 15, 2020 12:14 am

Given the structure of each molecule, you are also able to figure out the molecular formulas from them! A general rule of thumb is that each question that Lavelle gives should have all the information necessary to solve it (no google allowed during tests)! Each corner of the molecule will be a Carbon and each Carbon has 4 valence electrons, meaning it will have 4 total bonds. Any free C electrons will have a Hydrogen attached. Therefore you can count the Carbons, Hydrogens, and any other elements to come up with the molecular formula!

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