Make it yours.Save notes, decks & boards to your own library.

openstem

Explore

Spaces

My Library

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Chemistry Chemistry groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Chemistry

Reactions, bonding and organic chemistry on openstem — flashcards, notes, quizzes and molecule structures shared by the community. Study free, or clone into your library.

Content Groups1

Loading…

loading…

About Privacy Terms of Service© openstem

We use privacy-friendly product analytics (no session recording, PII masked) to improve OpenStem. Load analytics? Privacy Policy

openstem

Explore

Groups Favorites

Collections Notes Flashcards Quizzes Sketches Flowcharts Plots Molecules

Make it yours.Save notes, decks & boards to your own library.

Get started Sign in

Explore Groups Favorites

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Chemistry Chemistry groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Chemistry

Reactions, bonding and organic chemistry on openstem — flashcards, notes, quizzes and molecule structures shared by the community. Study free, or clone into your library.

Content Groups1

Loading…

Chemistry: explore STEM content (page 31 of 47) · openstem

Flowchart9 objects

Chemistry

Chemistry · L2 · Anatomy of a Word Equation

@openstem

Chemistry · L2 · Anatomy of a Word Equation

Flowchart7 objects

Chemistry

Chemistry · L3 · Half-Life Decay Staircase

@openstem

Chemistry · L3 · Half-Life Decay Staircase

Note~851 words · 4 min

Two industrial equilibria, one engineering compromise It's tempting to assume a chemical plant runs at whatever temperature and pressure gives the equilibrium the highest possible yield. In practice, almost none do. Real industrial conditio

Chemistry

Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

@openstem

Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

Flashcards10 cards

Starting from the Ka expression for a weak acid HA, derive the Henderson–Hasselbalch equation.1 / 10

Ka = [H⁺][A⁻]/[HA]. Taking −log of both sides: −log Ka = −log[H⁺] − log([A⁻]/[HA]), i.e. pKa = pH − log([A⁻]/[HA]). Rearranging gives

Chemistry

Chemistry · L4 · Buffer Calculations and Capacity

@openstem

Chemistry · L4 · Buffer Calculations and Capacity

Note~589 words · 3 min

Chemistry Beyond the Molecule Jean-Marie Lehn coined 'supramolecular chemistry' to describe a field that sits one level up from ordinary synthesis: instead of building new covalent bonds inside a molecule, it studies how whole molecules and

Chemistry

Chemistry · L5 · Supramolecular Chemistry: Host–Guest Recognition & Preorganization

@openstem

Chemistry · L5 · Supramolecular Chemistry: Host–Guest Recognition & Preorganization

Note~537 words · 3 min

What Makes a Dissolved Substance an Electrolyte? Not every dissolved substance behaves the same way once it is in water. Some substances, like table salt, split apart into separate charged particles called ions as they dissolve. Those ions

Chemistry

Chemistry · L2 · Electrolytes and Sports Drinks

@openstem

Chemistry · L2 · Electrolytes and Sports Drinks

Flowchart13 objects

Chemistry

Chemistry · L1 · From Old Bottle to New Jumper

@openstem

Chemistry · L1 · From Old Bottle to New Jumper

Flowchart18 objects

Chemistry

Chemistry · L4 · Heterogeneous equilibria: omitted phases, Kp, and the Kp–Kc relationship · flowchart

@openstem

Chemistry · L4 · Heterogeneous equilibria: omitted phases, Kp, and the Kp–Kc relationship · flowchart

Collection7 items

01Chemistry · L2 · Polymers and Monomers

02Chemistry · L2 · Plastics — Useful but Tricky

03Chemistry · L2 · Polymers and Plastics

+4 more

Chemistry

Chemistry · L2 · Polymers and Plastics

@openstem

Chemistry · L2 · Polymers and Plastics

Flowchart19 objects

Chemistry

Chemistry · L4 · Spectroscopy basics: what each technique measures · flowchart

@openstem

Chemistry · L4 · Spectroscopy basics: what each technique measures · flowchart

Flashcards10 cards

What is a mixture?1 / 10

Two or more things stirred together, without becoming a new substance.

Chemistry

Chemistry · L1 · Mixtures vs. Solutions

@openstem

Chemistry · L1 · Mixtures vs. Solutions

Note~260 words · 1 min

Why a Candle Burns A candle looks so simple — just a stick of wax with a little flame on top. But that tiny flame needs three things at the very same time to keep burning. The Three Things Every Flame Needs How the Wick Feeds the Flame Soli

Chemistry

Chemistry · L1 · Why a Candle Burns

@openstem

Chemistry · L1 · Why a Candle Burns

Flashcards9 cards

State the 18-electron rule and the analogy it is based on.1 / 9

A transition-metal complex tends to be especially stable when the metal's total valence electron count — its own d-electrons plus every electron donated by its ligands — reaches 18, filling all nine valence orbitals (one s, three p, five d). It is the organometallic analogue of the main-group octet rule (one s + three p = 8). Fe(CO)5, Ni(CO)4, Cr(CO)6, and ferrocene all obey it exactly, but it is a strong guideline, not an absolute law — plenty of stable complexes sit below 18.

Chemistry

Chemistry · L5 · Organometallic Chemistry: Electron Counting & Elementary Steps

@openstem

Chemistry · L5 · Organometallic Chemistry: Electron Counting & Elementary Steps

Flowchart7 objects

Chemistry

Chemistry · L1 · Melting and Freezing

@openstem

Chemistry · L1 · Melting and Freezing

Quiz6 questions

Two identical bikes are left out for a month — one in the rain, one in a dry shed. Which one is more likely to rust?

AThe one in the dry shedBThe one left out in the rainCNeither will rustDBoth will rust the same amount

Chemistry

Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

@openstem

Chemistry · L1 · Weathering: Why Outdoor Metal Rusts

Collection9 items

01Chemistry · L4 · Intermolecular forces & molecular polarity — vectors, polarizability, and boiling-point trends

02Chemistry · L4 · Intermolecular Forces & Molecular Polarity

03Chemistry · L4 · Is a molecule polar? Bond dipoles as vectors

+6 more

Chemistry

Chemistry · L4 · Intermolecular Forces & Polarity

@openstem

Chemistry · L4 · Intermolecular Forces & Polarity

Flashcards10 cards

What is the design philosophy behind 'click chemistry', as originally proposed by K. B. Sharpless and coworkers?1 / 10

Click chemistry describes a small set of reactions chosen for being modular, giving very high yields, generating only inoffensive byproducts that can be removed without chromatography, being stereospecific, and running under simple conditions — often in water, at room temperature, tolerant of many functional groups. The goal is a dependable, 'plug-and-play' bond-forming toolkit rather than one reaction optimised for a single target.

Chemistry

Chemistry · L5 · Click Chemistry and Bioorthogonal Labeling

@openstem

Chemistry · L5 · Click Chemistry and Bioorthogonal Labeling

Note~680 words · 3 min

From amino acids to protein structure — a chemist's view A protein is, chemically, a long chain built from a small alphabet of monomers — the 20 standard amino acids — joined end to end by a single repeating bond type. Understanding a prote

Chemistry

Chemistry · L4 · From amino acids to protein structure — a chemist's view

@openstem

Chemistry · L4 · From amino acids to protein structure — a chemist's view

Flowchart15 objects

Chemistry

Chemistry · L5 · Sharpless Asymmetric Epoxidation Face-Selectivity

@openstem

Chemistry · L5 · Sharpless Asymmetric Epoxidation Face-Selectivity

Quiz6 questions

What does the quadrant model describe in chiral bisphosphine hydrogenation catalysis?

AA chiral bidentate ligand's bulky groups create two blocked and two open quadrants around the metal, forcing the prochiral substrate to bind in only one orientationBThe metal cycles through four different oxidation states during one catalytic turnoverCFour different achiral phosphine ligands compete for the same coordination siteDThe substrate is hydrogenated equally on all four possible approach faces

Chemistry

Chemistry · L5 · Asymmetric Catalysis Mechanisms — 6 Q

@openstem

Chemistry · L5 · Asymmetric Catalysis Mechanisms — 6 Q

Flowchart10 objects

Chemistry

Chemistry · L1 · Ice, Water, and Floating

@openstem

Chemistry · L1 · Ice, Water, and Floating

Flowchart9 objects

Chemistry

Chemistry · L4 · From amino acids to protein structure — a chemist's view · flowchart

@openstem

Chemistry · L4 · From amino acids to protein structure — a chemist's view · flowchart

MoleculeReaction: OB(O)c1ccccc1.Brc1ccccc1>>c1ccc(-c2ccccc…

Chemistry

Chemistry · L3 · Suzuki coupling

@openstem

Chemistry · L3 · Suzuki coupling

Quiz5 questions

What causes the lanthanide contraction?

APoor mutual shielding by 4f electrons lets effective nuclear charge on outer electrons rise steadily across the series, pulling the ionic radius inwardBThe lanthanides lose electrons progressively across the seriesCIncreasing atomic mass directly shrinks the ionic radiusDThe 4f orbitals expand outward across the series

Chemistry

Chemistry · L5 · Lanthanide & Actinide Chemistry

@openstem

Chemistry · L5 · Lanthanide & Actinide Chemistry

Note~296 words · 1 min

Why Food Colouring Spreads Through Water Drop a single drop of food colouring into a still glass of water and watch closely. Slowly, it spreads out into curly, cloud-like tendrils. Given enough time, the whole glass becomes evenly tinted —

Chemistry

Chemistry · L1 · Why Food Colouring Spreads Through Water

@openstem

Chemistry · L1 · Why Food Colouring Spreads Through Water

Flashcards12 cards

What does electronegativity measure?1 / 12

An atom's ability to attract (pull) the pair of electrons shared in a covalent bond toward itself.

Chemistry

Chemistry · L3 · Electronegativity and Bond Polarity

@openstem

Chemistry · L3 · Electronegativity and Bond Polarity

Collection4 items

01Chemistry · L4 · Transition Metal Chemistry in Solution

02Chemistry · L4 · Transition metal chemistry in solution: colors, amphoterism, and trends

03Chemistry · L4 · Testing whether a metal hydroxide is amphoteric

+1 more

Chemistry

Chemistry · L4 · Transition Metal Chemistry in Solution

@openstem

Chemistry · L4 · Transition Metal Chemistry in Solution

Flashcards8 cards

What does the 'equivalence point' of an acid–base titration mean?1 / 8

The point where the moles of base added exactly equal the moles of acid originally in the flask — the acid and base have exactly neutralised each other.

Chemistry

Chemistry · L3 · Titration curves

@openstem

Chemistry · L3 · Titration curves

Flashcards10 cards

While a substance is melting or boiling, heat keeps flowing in — so why doesn't its temperature rise?1 / 10

Because every joule of that heat is going into breaking apart the intermolecular attractions holding the particles in their current arrangement, not into speeding the particles up. Since temperature is a measure of average particle speed (kinetic energy), the thermometer doesn't move until the phase change is completely finished.

Chemistry

Chemistry · L3 · Specific Latent Heat

@openstem

Chemistry · L3 · Specific Latent Heat

Flashcards7 cards

What does a chemical formula show you?1 / 7

Which elements a substance is made of, and exactly how many atoms of each element are joined together in one unit of it.

Chemistry

Chemistry · L2 · Reading Chemical Formulae

@openstem

Chemistry · L2 · Reading Chemical Formulae

‹ PrevPage 31 of 47Next ›