Welcome Guest Search | Active Topics |

Tag as favorite
Solutions
Options
Previous Topic Next Topic
mahacrown
#1 Posted : Thursday, July 12, 2018 3:58:37 PM
Rank: Newbie

Groups:
Joined: 7/6/2018
Posts: 2

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi!

One question from the AAMC prep test asked "What volume of a .0120 M CaI2 solution would contain 0.078 mol of the solute. The correct answer was 650mL, which means they considered the Ca2+ ion as the solute. In this case why would that be the solute and not the I- ions. It was a standalone question, and I believe if we take iodine as the solute we would get a smaller volume as a result because each mole of the molecule would give 2 mols of iodine ions

Thank you
Back to top
Report?
faisaluddin
#2 Posted : Tuesday, July 17, 2018 8:45:33 PM
Rank: Instructor

Groups:
Joined: 6/9/2016
Posts: 6

Thanks: 0 times
Was thanked: 0 time(s) in 0 post(s)
Hi mahacrown,

They are actually considering whole CaI2 compound as the "solute." Generally, the question should be more clear when talking about solutes but the AAMC decided to be vague with this question. They should specify "moles of ion X" to be more clear.

Based on this, the answer should be 650 mL as you have found.

When you read the question and it is referring to "the" solute, as in just one solute, it probably is safe to assume they are referring to the original compound as a whole.
Back to top
Report? | Edit by user
Users browsing this topic
Guest
Tag as favorite
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Clean Slate theme by Jaben Cargman (Tiny Gecko)
Powered by YAF | YAF © 2003-2009, Yet Another Forum.NET
This page was generated in 0.081 seconds.