Entrance Exam Semmelweis Questions with

Entrance Exam Semmelweis 2024/2025 Questions with Complete Solutions Electron configuration for cations - Correct Answer Subtract 1 from exponent of highest n-value orbital (ex. remove from 4s before 3d) Ag+ = [Kr]5s^1 4d^9 Electron configuration for anions - Correct Answer Add 1 to closest orbital Cl- = [Ne]3s^2 3p^6 Atomic orbitals - Correct Answer s, p, d, f Primary vs secondary structures of proteins - Correct Answer Primary - AA chain (linked by peptide bonds) Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets) Most bonds in organic compounds are - Correct Answer covalent Properties of water - Correct Answer 1. polar

• capable of adhesion and cohesion
• high heat capacity (so it's hard to raise its temp)
• great solvent
• high heat of vaporization (allows humans to cool off via sweat)
• water is less dense as a solid than a liquid

Intermolecular forces of water - Correct Answer hydrogen bonding 1 / 3

Solution components - Correct Answer 1. solvent (product being dissolved)

• solute (medium for dissolving solvent)

Molarity - Correct Answer the number of moles of solute per liter of solution Solubility rules - Correct Answer SOLUBLE

• alkali metals (group 1) & NH4+ cations
• NO3- or CH3COO- anions
• Cl, Br, I (except when bonded to Ag+, Pb2+ or Hg2+)
• sulfate ions (except when with Ca2+, Sr2+, Ba2+, Pb2+)

INSOLUBLE

• Metal oxides (except CaO, SrO, BaO)
• Hydroxides (except when with Ca2+, Sr2+, Ba2+)
• Carbonates, phosphates, sulfides, and sulfites (unless bound to alkali metal or NH4+)

Solubility product - Correct Answer Ksp = [A]^a[B]^b **only products because we don't include solids in the equilibrium expression for NaCl

• Ksp = x^2

for PbCl2

• Ksp = 4x^3

for Cr(OH)3

• Ksp = 27x^4 2 / 3

Large Ksp means - Correct Answer strong electrolyte (more soluble) Strong acids - Correct Answer So I brought no clean clothes

1. H2SO4

2. HI

• HBr

4. HNO3

• HCl
• HClO4
• HClO3

Strong bases - Correct Answer 1. NaOH

• LiOH

3. KOH

• CsOH
• RbOH
• Ba(OH)2
• Ca(OH)2
• Sr(OH)2

Bases can certainly look pleasing (K), really something strong (Na) Le Chatlier's principle: pressure - Correct Answer pressure applied (or volume reduced) --> equilibrium proceeds in direction with fewer moles pressure removed (or volume increased) --> equilibrium proceeds in direction with more moles Le Chatlier's principle: temperature - Correct Answer increasing temperature

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