Return to Blog
Homepage
MCAT Chemistry Question — Acid/Base Pairs
- by
- Jan 09, 2014
- MCAT Blog, MCAT Question of the Day
Which of the following acid/base pairs yields the most nearly neutral aqueous solution when mixed?
a) HCl/NaF
b) H2CO3/2 NaOH
c) HCl/NaOH
d) HBr/NH3
Explanation:
a) incorrect, strong acid + weak base forms NaCl and HF, the HF hydrolyzes to H3O+ and F–, pH<7
b) incorrect, weak acid + strong base forms Na2CO3 + 2 H2O, and the CO32- ion autoionizes water, to create OH– ions, pH>7
c) correct, strong acid + strong base forms NaCl + H2O and salt ions do not react with water to change pH, pH=7
d) incorrect, strong acid + weak base forms NH4Br, the NH4+ ions weakly dissociates to NH3 + H+ and Br– does not react with water, pH<7
Want more MCAT practice?
We’ve got options for every schedule and learning style!
From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT Advisor using the form below. No obligation, just expert advice.
Related Posts
Search the Blog
Free Consultation
Interested in our Online MCAT Course, One-on-One MCAT Tutoring or Med admissions packages? Set up a free consultation with one of our experienced Senior Student Advisors.
Schedule NowPopular Posts
-
-
MCAT Blog What's on the MCAT? -
-
-
MCAT Blog How to Review MCAT Full Lengths
Free MCAT Practice Account
Need great MCAT practice?Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.
Learn More