Entrance Exam Semmelweis Questions With
Complete Solutions
Electron configuration for cations 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 Add 1 to closest orbital
Cl- = [Ne]3s^2 3p^6
Atomic orbitals s, p, d, f
Primary vs secondary structures of proteins Primary - AA chain (linked by peptide bonds)
Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets)
Most bonds in organic compounds are covalent
, Entrance Exam Semmelweis Questions With
Complete Solutions
Properties of water 1. polar
2. capable of adhesion and cohesion
3. high heat capacity (so it's hard to raise its temp)
4. great solvent
5. high heat of vaporization (allows humans to cool off via sweat)
6. water is less dense as a solid than a liquid
Intermolecular forces of water hydrogen bonding
Solution components 1. solvent (product being dissolved)
2. solute (medium for dissolving solvent)
Molarity the number of moles of solute per liter of solution
Solubility rules SOLUBLE
1. alkali metals (group 1) & NH4+ cations
, Entrance Exam Semmelweis Questions With
Complete Solutions
2. NO3- or CH3COO- anions
3. Cl, Br, I (except when bonded to Ag+, Pb2+ or Hg2+)
4. sulfate ions (except when with Ca2+, Sr2+, Ba2+, Pb2+)
INSOLUBLE
1. Metal oxides (except CaO, SrO, BaO)
2. Hydroxides (except when with Ca2+, Sr2+, Ba2+)
3. Carbonates, phosphates, sulfides, and sulfites (unless bound to alkali metal or NH4+)
Solubility product 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
, Entrance Exam Semmelweis Questions With
Complete Solutions
for Cr(OH)3
- Ksp = 27x^4
Large Ksp means strong electrolyte (more soluble)
Strong acids So I brought no clean clothes
1. H2SO4
2. HI
3. HBr
4. HNO3
5. HCl
6. HClO4
7. HClO3
Strong bases 1. NaOH
Complete Solutions
Electron configuration for cations 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 Add 1 to closest orbital
Cl- = [Ne]3s^2 3p^6
Atomic orbitals s, p, d, f
Primary vs secondary structures of proteins Primary - AA chain (linked by peptide bonds)
Secondary - stabilized by non-covalent bonds (alpha helices & beta sheets)
Most bonds in organic compounds are covalent
, Entrance Exam Semmelweis Questions With
Complete Solutions
Properties of water 1. polar
2. capable of adhesion and cohesion
3. high heat capacity (so it's hard to raise its temp)
4. great solvent
5. high heat of vaporization (allows humans to cool off via sweat)
6. water is less dense as a solid than a liquid
Intermolecular forces of water hydrogen bonding
Solution components 1. solvent (product being dissolved)
2. solute (medium for dissolving solvent)
Molarity the number of moles of solute per liter of solution
Solubility rules SOLUBLE
1. alkali metals (group 1) & NH4+ cations
, Entrance Exam Semmelweis Questions With
Complete Solutions
2. NO3- or CH3COO- anions
3. Cl, Br, I (except when bonded to Ag+, Pb2+ or Hg2+)
4. sulfate ions (except when with Ca2+, Sr2+, Ba2+, Pb2+)
INSOLUBLE
1. Metal oxides (except CaO, SrO, BaO)
2. Hydroxides (except when with Ca2+, Sr2+, Ba2+)
3. Carbonates, phosphates, sulfides, and sulfites (unless bound to alkali metal or NH4+)
Solubility product 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
, Entrance Exam Semmelweis Questions With
Complete Solutions
for Cr(OH)3
- Ksp = 27x^4
Large Ksp means strong electrolyte (more soluble)
Strong acids So I brought no clean clothes
1. H2SO4
2. HI
3. HBr
4. HNO3
5. HCl
6. HClO4
7. HClO3
Strong bases 1. NaOH
