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MCAT 5A · Chem/Phys

Water, Solutions, Acids and Bases

442 original Anki flashcards, a 10-page illustrated study guide, a 3-page cheat sheet and 51 practice questions for MCAT content category 5A.

What is inside

  • deck.apkg442 original Anki flashcards (210 short answer, 93 multiple choice, 75 cloze, 57 true/false, 7 image occlusion), 23 original diagrams
  • guide.pdf10-page illustrated study guide that explains the ideas
  • cheatsheet.pdf3 printable pages, US Letter at 100 percent
  • questions.pdf51 original MCAT-style practice questions with explanations, including 3 passage-based sets
  • README.txtimport steps
  • 210 short answer
  • 93 multiple choice
  • 75 cloze
  • 57 true/false
  • 7 image occlusion

Topics (21)

  • 01AcAcid and base definitions: Arrhenius, Bronsted-Lowry, Lewis
  • 02WaWater autoionization and Kw
  • 03PhpH and pOH calculations
  • 04StStrong versus weak acids and bases
  • 05KaKa, Kb, pKa and conjugate pairs
  • 06PoPolyprotic acids
  • 07AmAmphoteric species
  • 08BuBuffers and Henderson-Hasselbalch
  • 09BiBicarbonate buffer in blood
  • 10TiTitration curves and equivalence points
  • 11InIndicators
  • 12SaSalt hydrolysis
  • 13SoSolution concentration units
  • 14DiDilution
  • 15SoSolubility rules
  • 16KsKsp and molar solubility
  • 17CoCommon ion effect
  • 18CoComplex ion formation
  • 19CoColligative properties
  • 20IoIons in solution and hydration
  • 21ElElectrolytes

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  4. Print the PDFs on US Letter at 100 percent, or read them on screen.

Previews

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Sample card (answer side)
Sample card (answer side)
Sample card (answer side)
Sample card (answer side)
Cheat sheet, page 1 (partial preview)
Cheat sheet, page 2 (partial preview)
Study guide, page 1 (partial preview)
Study guide, page 2 (partial preview)

Try it · sample practice questions

Five questions from the pack.

0 of 5 answered

Q1Which species acts as a Lewis acid in AlCl3 + Cl- -> AlCl4-?

A. AlCl3 has an empty orbital on aluminum and accepts an electron pair from Cl-. Chloride is the donor (Lewis base). AlCl4- is the product. The Lewis definition does not require protons, so the last option is wrong.

Q2At pH 7.4, which phosphate species pair dominates (pKa2 = 7.20)?

A. pH is 0.2 above pKa2, so the ratio is 10^0.2 = 1.6 HPO4 2- per H2PO4-. H3PO4 is minor above pH 4. PO4 3- appears only near pKa3 (12.35), and both species are present, not just H2PO4-.

Q3A weak base B (0.10 M, pKb 4.75) is half-neutralized by HCl. The pH is:

A. At half-equivalence [B] = [BH+], so pH = pKa of BH+ = 14 - 4.75 = 9.25. The value 4.75 is the pKb (a pOH here), 7.00 is for a strong acid and strong base, and 5.28 is the pH at full equivalence.

Q4Ksp of PbI2 is 7.1 x 10^-9. Its molar solubility is closest to:

A. Ksp = 4s^3, so s = (7.1e-9/4)^(1/3) = 1.2e-3 M. 8.4e-5 uses s^2 (the AB formula), 7.1e-9 is the Ksp itself, and 1.8e-3 uses the wrong power.

Q5The osmotic pressure of 0.050 M CaCl2 at 300 K (R = 0.0821 L atm/mol K, i = 3) is closest to:

A. pi = iMRT = 3 x 0.050 x 0.0821 x 300 = 3.7 atm. 1.2 atm omits i, 0.12 atm uses the wrong power of ten, and 11 atm is three times too large.

Those are real questions from the pack, word for word.

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