What does this General Chemistry I cheat sheet cover?

It has 11 sections: Moles & Mass, Stoichiometry, Limiting Reagent, Solutions, Gas Laws, Atomic Structure, Periodic Trends, Bonding & VSEPR, IMFs & Phases, Thermochemistry and Reaction Types. Together they cover the topics a typical General Chemistry I exam tests, including moles, molar mass, stoichiometry, limiting reagent and percent yield, solution concentration and dilution and gas laws.

Is the general chemistry cheat sheet free?

The first part is free to read on this page, with no account needed. The full sheet opens in the app with Unlimited ($4.99 a month or $19 for a semester), where you can edit it, print it or save it as a PDF. It is one US Letter page and prints cleanly in black and white or colour.

Can I bring this General Chemistry I cheat sheet to my exam?

Only if your course allows a note sheet, so check the syllabus. This one is a single US Letter page. If your exam allows a different size, such as a 3x5 or 4x6 index card or one page front and back, Cheat Sheet AI makes one at exactly that size from your own lecture notes.

The sheet was written by our engine from a standard course outline, then a second model fact-checked every formula and statement against it; it corrected 2 statements before publishing. Notation and emphasis vary between courses, so check it against your own lecture notes.

Can I make a General Chemistry I sheet from my own notes?

Yes. Upload your lecture slides, notes or study guide and Cheat Sheet AI writes a sheet in your course's notation, sized to exactly the space your exam allows. Your first sheets are free.

Chemistry & BioGeneral Chemistry I

General Chemistry Cheat Sheet — 1-page PDF

Core quantitative rules, structure, bonding, gas, solution, and thermochem. The whole course on one dense, printable page for your midterm or final, with every formula typeset and worked examples where they help.

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For a specific exam: General Chemistry I Midterm 1 study sheet, General Chemistry I Final exam study sheet.

1 pageUS Letter
11 sections10 topics
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Preview of the one-page General Chemistry I cheat sheet: Core quantitative rules, structure, bonding, gas, solution, and thermochem — the whole course, one page

On the sheet

What’s on it

The topics a typical General Chemistry I exam tests, all on the one page.

Moles, molar mass, stoichiometry
Limiting reagent and percent yield
Solution concentration and dilution
Gas laws
Atomic structure and electron configuration
Periodic trends
Lewis structures and VSEPR
Intermolecular forces
Thermochemistry and Hess's law
Reaction types

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The free part, as text

The free part of the sheet, section by section. Unlock the full sheet to read the rest, edit any block, and print it or save it as a PDF.

01Moles & Mass

mole: Amount of substance containing $6.022 \times 1 0^{23}$ entities (Avogadro's number, $N_{A}$ ).

Avogadro

N = n N_{A}

$N$ = number of particles; $n$ = moles; $N_{A} = 6.022 \times 1 0^{23} mo l^{- 1}$

Molar mass

M = \frac{m}{n}

$M$ in $g mo l^{- 1}$ ; $m$ = mass (g); $n$ = moles

Mass↔moles

n = \frac{m}{M}

Convert g ⇄ mol

Particle count

n = \frac{N}{N _{A}}

Use for atoms, molecules, formula units, ions

Ex.How many moles in $18.0 g$ of $H X_{2} O$ ?

$M = 18.0 g mo l^{- 1}$ ; $n = m / M = 18.0/18.0 = 1.00 mol$

Ex.How many molecules in $0.250 mol$ $CO X_{2}$ ?

$N = n N_{A} = 0.250 (6.022 \times 1 0^{23}) = 1.51 \times 1 0^{23}$ molecules

02Stoichiometry

stoichiometric coefficients: Balanced equation numbers giving mole ratios among reactants/products.

Mole ratio

\frac{mol A}{mol B} = \frac{coeff A}{coeff B}

From balanced equation only

Balance equation.
Convert given quantity to mol.
Use mole ratio to find mol desired.
Convert mol to requested unit.

03Solutions

Molarity

M = \frac{n}{V}

Units $mol L^{- 1}$

Dilution

M_{1} V_{1} = M_{2} V_{2}

Same solute moles before/after dilution; $V$ in same units

Mass percent

% m / m = \frac{m _{solute}}{m _{solution}} \times 100%

If assigned

ppm

ppm = \frac{m _{solute}}{m _{solution}} \times 1 0^{6}

Mass basis; for dilute aqueous solutions, ppm ≈ mg/L (or mg/kg)

Ex.Make $250. mL$ of $0.200 M$ solution from $1.00 M$ stock. Find $V_{1}$ .

$V_{1} = M_{2} V_{2} / M_{1} = (0.200) (0.250) /1.00 = 0.0500 L = 50.0 mL$

Ex. $5.00 g$ solute in $100.0 g$ solution. Mass percent?

$(5.00/100.0) \times 100% = 5.00%$

04Gas Laws

Ideal gas

P V = n R T

$P$ = pressure, $V$ = volume, $n$ = moles, $R$ = gas constant, $T$ = K

Common $R$ values

$R$	Units	Use
$0.08206$	$L atm mo l^{- 1} K^{- 1}$	when $P$ in atm, $V$ in L
$8.314$	$J mo l^{- 1} K^{- 1}$	thermo
$62.36$	$L torr mo l^{- 1} K^{- 1}$	when $P$ in torr

05Periodic Trends

Trend directions

Property	Across period $\to$	Down group $↓$
Atomic radius	decreases	increases
Ionization energy	increases	decreases
Electron affinity	more negative	less negative
Metallic character	decreases	increases

Successive ionization

I E_{1} < I E_{2} < I E_{3} < \dots

Big jump after valence e $^{-}$ removed

isoelectronic: Species with same number of electrons; smaller $Z$ ⇒ larger radius.

Watch out:Common trap: compare ions isoelectronically by nuclear charge, not by neutral-atom position alone.

Ex.Largest radius: $Na X^{+}$ , $Mg X_{2} X^{+}$ , $Al X_{3} X^{+}$ ?

All $10$ e $^{-}$ ; smallest $Z$ = $11$ ⇒ $Na X^{+}$ largest

06Bonding & VSEPR

Lewis structure: Valence-electron bookkeeping showing bonds, lone pairs, formal charges.

Formal charge

FC = V - (N + \frac{1}{2} B)

$V$ valence e $^{-}$ ; $N$ nonbonding e $^{-}$ ; $B$ bonding e $^{-}$

Count total valence e $^{-}$ (add for anions, subtract for cations).
Choose central atom (usually least electronegative; never H).
Make single bonds, complete octets on terminal atoms.
Place leftover e $^{-}$ on central atom; form multiple bonds if needed.
Check formal charges; minimize magnitude, place negative FC on more electronegative atom.

07IMFs & Phases

hydrogen bonding: Special dipole-dipole when H is bonded to $N$ , $O$ , or $F$ and interacts with lone pair on $N / O / F$ .

Dispersion

polarizability $↑\Rightarrow$ London forces $↑$

More e $^{-}$ / larger molar mass / more surface area

Heating curve

q = m c Δ T

Within a phase; $c$ = specific heat

Phase change

q = n Δ H_{fus}, q = n Δ H_{vap}

At melting/boiling; $T$ constant

Ex.Which has higher boiling point: $CH X_{4}$ or $CH X_{3} OH$ ?

$CH X_{3} OH$ : hydrogen bonding + dipole-dipole > only London in $CH X_{4}$

08Thermochemistry

system / surroundings: System = reaction of interest; surroundings = everything else.

First law

Δ E = q + w

Chem sign convention: $q > 0$ absorbed by system; $w > 0$ work done on system

PV work

w = - P_{ext} Δ V

Expansion: $Δ V > 0 \Rightarrow w < 0$

Enthalpy

H = E + P V

At constant pressure, $q_{p} = Δ H$

Calorimetry

q = m c Δ T = C Δ T

$C$ = heat capacity; sign from $Δ T$

Cheat sheet locked

Also on the full General Chemistry I sheet

10 more sections, with every definition, formula and worked example. Unlimited unlocks every full sheet in the library to edit, print or save as a PDF, and makes unlimited sheets from your own notes.

Stoichiometry

Mass-mass
Percent yield
Percent error

Limiting Reagent

limiting reagent
excess reagent
Leftover
Reaction completion

Solutions

molarity

Gas Laws

Combined gas law
Boyle
Charles
Dalton
Density

Atomic Structure

atomic number
mass number
Charge
Photon energy
de Broglie

Periodic Trends

effective nuclear charge

Bonding & VSEPR

VSEPR shapes
Molecular shapes from lone pairs

IMFs & Phases

intermolecular forces
Strength order

Thermochemistry

Hess

Reaction Types

Core patterns
precipitation reaction
acid-base neutralization
redox
Oxidation numbers

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FAQ

Questions

About the General Chemistry I sheet and making your own.

What does this General Chemistry I cheat sheet cover?: It has 11 sections: Moles & Mass, Stoichiometry, Limiting Reagent, Solutions, Gas Laws, Atomic Structure, Periodic Trends, Bonding & VSEPR, IMFs & Phases, Thermochemistry and Reaction Types. Together they cover the topics a typical General Chemistry I exam tests, including moles, molar mass, stoichiometry, limiting reagent and percent yield, solution concentration and dilution and gas laws.
Is the general chemistry cheat sheet free?: The first part is free to read on this page, with no account needed. The full sheet opens in the app with Unlimited ($4.99 a month or $19 for a semester), where you can edit it, print it or save it as a PDF. It is one US Letter page and prints cleanly in black and white or colour.
Can I bring this General Chemistry I cheat sheet to my exam?: Only if your course allows a note sheet, so check the syllabus. This one is a single US Letter page. If your exam allows a different size, such as a 3x5 or 4x6 index card or one page front and back, Cheat Sheet AI makes one at exactly that size from your own lecture notes.
How accurate is it?: The sheet was written by our engine from a standard course outline, then a second model fact-checked every formula and statement against it; it corrected 2 statements before publishing. Notation and emphasis vary between courses, so check it against your own lecture notes.
Can I make a General Chemistry I sheet from my own notes?: Yes. Upload your lecture slides, notes or study guide and Cheat Sheet AI writes a sheet in your course's notation, sized to exactly the space your exam allows. Your first sheets are free.

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