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Chemistry: explore STEM content (page 13 of 47) · openstem

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

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Collection4 items

01Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

02Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

03Chemistry · L3 · Haber vs Contact — same compromise, different pressure answer

+1 more

Chemistry

Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

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Chemistry · L3 · Industrial Equilibrium — Haber and Contact Processes

Flowchart7 objects

Chemistry

Chemistry · L4 · Addition and Elimination Mechanisms · flowchart

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Chemistry · L4 · Addition and Elimination Mechanisms · flowchart

Quiz5 questions

What is the key principle behind using a radical clock to measure an ultrafast bimolecular rate constant?

AIt directly times the fast reaction using a high-speed detectorBIt sets the unknown bimolecular reaction in competition with a unimolecular rearrangement of known rate, then calculates the unknown rate from the product ratioCIt only works for reactions slower than one secondDIt measures the radical's mass spectrum instead of its rate

Chemistry

Chemistry · L5 · Advanced Radical Chemistry

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Chemistry · L5 · Advanced Radical Chemistry

Flowchart9 objects

Chemistry

Chemistry · L3 · Electrolysis of molten lead bromide

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Chemistry · L3 · Electrolysis of molten lead bromide

Flashcards8 cards

What does a flammable hazard symbol mean?1 / 8

The substance catches fire easily. Keep it away from flames, sparks, and other heat sources.

Chemistry

Chemistry · L2 · Hazard Pictogram Categories

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Chemistry · L2 · Hazard Pictogram Categories

Note~429 words · 2 min

From River to Tap: Treating Water for Drinking Water taken from a river or reservoir is not safe to drink straight away. It can carry floating rubbish, suspended grit, and microscopic pathogens. A water treatment plant cleans it up through

Chemistry

Chemistry · L2 · Treating Water for Drinking

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Chemistry · L2 · Treating Water for Drinking

Quiz6 questions

A buffer contains 0.25 M HA and 0.25 M A⁻, where pKa of HA = 4.75. What is the pH?

A4.75B4.25C5.25D3.75

Chemistry

Chemistry · L4 · Buffer Calculations and Capacity — 6 Q

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Chemistry · L4 · Buffer Calculations and Capacity — 6 Q

Flowchart15 objects

Chemistry

Chemistry · L5 · SN1 vs SN2 Reaction Pathways

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Chemistry · L5 · SN1 vs SN2 Reaction Pathways

Flowchart7 objects

Chemistry

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

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

Flowchart21 objects

Chemistry

Chemistry · L5 · Nanomaterials and Quantum Confinement · flowchart

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Chemistry · L5 · Nanomaterials and Quantum Confinement · flowchart

Flashcards10 cards

What is a standard reduction potential (E°), and what counts as 'standard conditions'?1 / 10

E° is the voltage of a half-reaction, written as a reduction, measured against the standard hydrogen electrode (SHE, defined as exactly 0.00 V) under standard conditions: 1 M ion concentrations, 1 atm gas pressure, 25 °C. A more positive E° means a stronger pull on electrons — a better oxidising agent.

Chemistry

Chemistry · L4 · Electrochemistry: Standard Potentials & Cell Calculations

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Chemistry · L4 · Electrochemistry: Standard Potentials & Cell Calculations

Flowchart9 objects

Chemistry

Chemistry · L4 · Classifying Polymers by Thermal & Mechanical Behavior · flowchart

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Chemistry · L4 · Classifying Polymers by Thermal & Mechanical Behavior · flowchart

Note~366 words · 2 min

Reaction rates: what speeds a reaction up? The rate of a reaction is how quickly reactants turn into products — equivalently, how quickly a reactant's concentration falls. Some reactions (rusting) take years; others (an explosion) take mill

Chemistry

Chemistry · L3 · Reaction Rates & Kinetics

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Chemistry · L3 · Reaction Rates & Kinetics

Quiz6 questions

According to VSEPR theory, why do electron pairs around a central atom arrange the way they do?

AThey repel each other and spread out to be as far apart as possibleBThey attract each other and cluster together on one sideCTheir arrangement is random and unpredictableDThey arrange based on the atomic mass of the central atom

Chemistry

Chemistry · L3 · Molecular Geometry & VSEPR — 6 Q

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Chemistry · L3 · Molecular Geometry & VSEPR — 6 Q

Collection5 items

01Chemistry · L2 · Alloys — Mixing Metals for a Purpose

02Chemistry · L2 · Alloys — Mixing Metals for a Purpose

03Chemistry · L2 · Alloys — Pure Iron vs Steel

+2 more

Chemistry

Chemistry · L2 · Alloys — Mixing Metals for a Purpose

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Chemistry · L2 · Alloys — Mixing Metals for a Purpose

Note~284 words · 1 min

Water, a Special Liquid Water is the most common liquid on Earth. It fills oceans, rivers, and rain clouds. It is also inside you! But water does a few things that make it very unusual. Every drop of water is made of tiny water molecules, f

Chemistry

Chemistry · L1 · Water, a Special Liquid

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Chemistry · L1 · Water, a Special Liquid

Flashcards10 cards

What is invisible ink?1 / 10

It's a special "ink" that disappears once it dries on paper. You can make the message appear again later with a trick.

Chemistry

Chemistry · L1 · Secret Messages with Invisible Ink

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Chemistry · L1 · Secret Messages with Invisible Ink

Quiz5 questions

Why are pure metals malleable — able to be hammered or bent into new shapes without shattering?

ABecause metal atoms have no bonds holding them together at allBBecause layers of metal ions can slide past each other while the delocalised electron sea continuously re-bonds the new arrangementCBecause metals are always liquid at room temperatureDBecause metal ions repel each other and simply fall into a new position

Chemistry

Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder — 5 Q

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Chemistry · L3 · Metallic Bonding and Why Alloys Are Harder — 5 Q

Flowchart13 objects

Chemistry

Chemistry · L3 · Water Hardness · flowchart

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Chemistry · L3 · Water Hardness · flowchart

Quiz3 questions

Which state of matter keeps its own shape?

ALiquidBGasCSolidDSteam

Chemistry

Chemistry · L1 · States of Matter

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Chemistry · L1 · States of Matter

Quiz5 questions

What happens to ice in a glass of water?

AIt sinks to the bottomBIt floats on topCIt disappears instantlyDIt turns the water red

Chemistry

Chemistry · L1 · Water, a Special Liquid

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Chemistry · L1 · Water, a Special Liquid

Flowchart17 objects

Chemistry

Chemistry · L5 · Tg vs Tm: Two Different Transitions

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Chemistry · L5 · Tg vs Tm: Two Different Transitions

Flashcards8 cards

How do you classify an alcohol as primary, secondary, or tertiary?1 / 8

By how many carbon groups are attached to the OH-bearing carbon: primary (1°) has one, secondary (2°) has two, tertiary (3°) has three. Ethanol is 1°, isopropanol is 2°, tert-butanol is 3°.

Chemistry

Chemistry · L4 · Organic Chemistry II — The Oxidation Ladder

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Chemistry · L4 · Organic Chemistry II — The Oxidation Ladder

Flowchart33 objects

Chemistry

Chemistry · L4 · Anion tests: sulfate, carbonate, nitrate

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Chemistry · L4 · Anion tests: sulfate, carbonate, nitrate

Flashcards12 cards

What is a gas actually made of?1 / 12

A gas is made of countless tiny particles spread far apart, all moving around freely and quickly in every direction.

Chemistry

Chemistry · L2 · Gas Pressure — the Particle Picture

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Chemistry · L2 · Gas Pressure — the Particle Picture

Collection7 items

01Chemistry · L4 · Stereochemistry: Chirality, Enantiomers & R/S

02Chemistry · L4 · Stereochemistry: Chirality, Enantiomers, and R/S Naming

03Chemistry · L4 · Is This Carbon a Chiral Centre?

+4 more

Chemistry

Chemistry · L4 · Stereochemistry

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Chemistry · L4 · Stereochemistry

Flashcards12 cards

What is the solubility product constant, Ksp?1 / 12

Ksp is the equilibrium constant for the dissolution of a sparingly-soluble ionic solid into its constituent aqueous ions: MX(s) ⇌ M⁺(aq) + X⁻(aq), Ksp = [M⁺][X⁻]. The solid is omitted (pure solid, activity = 1). A larger Ksp means a more soluble compound, though comparing Ksp values directly across different stoichiometries can be misleading.

Chemistry