Find worked solutions for different exam papers, ask questions and connect with
medical aspirants and students from all over the world.

Home Forums IMAT Exam IMAT – Problem Solving and Discussion IMAT 2015 Chemistry Q52

  • IMAT 2015 Chemistry Q52

  • Ari Horesh

    Administrator
    June 18, 2021 at 6:41 pm
    933 Replies
    518026 XP
    Contributions: Team Manager
    Reputation: Level 9
    Up
    0
    Down

    Which one of the following 0.01 M aqueous solutions has a pH > 7.0?
    AlBr3
    NaI
    NH4Cl
    Na2CO3
    CH3CO2H

  • Paris Pitsinikos

    Member
    June 18, 2021 at 6:53 pm
    321 Replies
    64020 XP
    Contributions: Team Manager EnterMedSchool Donor Volunteer
    Reputation: Level 6
    Up
    0
    Down Accepted answer

    To figure this one out, we have to see which one will dissolve in water to give a basic solution. Essentially, which one has a component that can receive a proton from water to give us hydroxide ions and make the solution basic. Na2CO3 dissolves in water to give us the ions: Na+ and CO3-. From these ions, sodium is unable to react with water but CO3- acts like a Brønsted-Lowry base, attracting protons form water molecules, transforming them into [OH] and raising the pH above 7. The answer is ‘D’.

Sort by:
Viewing 1 - 2 of 2 replies

Log in to reply.

Original Post
0 of 0 posts June 2018
Now