ACS General Chemistry Final Exam Study Guide 2026–2027 | Practice Questions, Key Concepts & Complete Exam Review

ACS General Chemistry Final Exam

Terms in this set (148)



Law of Definite Proportions all samples of a given compound have the same proportions of their
constituent element


Mass Number A: protons + neutrons


Atomic Number Z: Number of Protons




Density= Mass/Volume


Frequency (v)= Speed of light (c)/wavelength


Electron Groups= 2 EG= linear
Bonding Groups= 2 MG= linear
Lone Pairs= 0 Bond Angle= 180


Electron Groups= 3 EG= trigonal planar
Bonding Groups= 3 MG= trigonal planar
Lone Pairs= 0 Bond Angle= 120


Electron Groups= 3 EG= trigonal planar
Bonding Groups= 2 MG= bent
Lone Pairs= 1 Bond Angle= <120


Electron Groups= 4 EG= tetrahedral
Bonding Groups= 4 MG= tetrahedral
Lone Pairs= 0 Bond Angle= 109.5


Electron Groups= 4 EG= tetrahedral
Bonding Groups= 3 MG=trigonal planar
Lone Pairs=1 Bond Angle= <109.5


Electron Groups= 4 EG= tetrahedral
Bonding Groups= 2 MG= Bent
Lone Pairs= 2 Bond Angle= <109.5


Electron Groups= 5 EG= trigonal bipyramidal
Bonding Groups= 5 MG= trigonal bipyramidal
Lone Pairs= 0 Bond Angle= 120 (equatorial) 90 (axial)

, ACS General Chemistry Final Exam




Electron Groups= 5 EG= trigonal bipyramidal
Bonding Groups= 4 MG= seesaw
Lone Pairs= 1 Bond Angle= <120 (equatorial) <90 (axial)


Electron Groups= 5 EG= trigonal bipyramidal
Bonding Grops= 3 MG= t-shaped
Lone Pairs= 2 Bond Angle= <90


Electron Groups= 5 EG= trigonal bipyramidal
Bonding Groups= 2 MG= Linear
Lone Pairs= 3 Bond Angle= 180


Electron Groups= 6 EG= octahedral
Bonding Groups= 6 MG= octahedral
Lone Pairs= 0 Bond Angle= 90


Electron Groups= 6 EG= octahedral
Bonding Groups= 5 MG= square pyramidal
Lone Pairs= 1 Bond Angle= <90


Hess' Law ΔHrxn= Σ ΔHf (products)- Σ ΔHf (reactants)


ΔS and ΔG can be calculated the same way


Calculating ΔG ΔG= -RTlnK and ΔG= -nFEcell


Calculating Kw [H+][OH-]= 1.0 x 10^-14


Relationship Between [H+] and [OH-] [H+]= [OH-] : neutral
[H+] > [OH-] : acidic
[H+] < [OH-] : basic




Q phase change Q phase change= ΔH phase change(mass)


Calculating Q using MCAT Q= m x Cs x ΔT


Low Energy high wavelength, low frequency


High Energy low wavelength, high frequency