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Chemistry: explore STEM content (page 30 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.

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MoleculeC=CC

Chemistry

Chemistry · L3 · Propene (Propylene)

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Chemistry · L3 · Propene (Propylene)

Flowchart19 objects

Chemistry

Chemistry · L3 · VSEPR shape decision tree

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Chemistry · L3 · VSEPR shape decision tree

Note~317 words · 2 min

One More Way to Sort Things You already know how to tell a metal from a non-metal. Metals are usually shiny and bend a little instead of snapping. Non-metals are usually dull, and they often snap, stretch, or break instead. There is one mor

Chemistry

Chemistry · L1 · Testing with Magnets

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Chemistry · L1 · Testing with Magnets

Collection6 items

01Chemistry · L3 · Reaction Rates & Kinetics

02Chemistry · L3 · Reaction rates & kinetics

03Chemistry · L3 · Successful vs Unsuccessful Collision

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Chemistry

Chemistry · L3 · Reaction Rates & Kinetics

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Chemistry · L3 · Reaction Rates & Kinetics

Quiz5 questions

What is the correct chemical symbol for sodium?

ASBSoCNaDN

Chemistry

Chemistry · L2 · Elements, Compounds & Chemical Formulae

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Chemistry · L2 · Elements, Compounds & Chemical Formulae

Flowchart8 objects

Chemistry

Chemistry · L1 · Browning and Toasting

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Chemistry · L1 · Browning and Toasting

Flowchart19 objects

Chemistry

Chemistry · L5 · Karplus Equation: Dihedral Angle to Coupling Constant

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Chemistry · L5 · Karplus Equation: Dihedral Angle to Coupling Constant

Flowchart11 objects

Chemistry

Chemistry · L5 · Carbene Chemistry · flowchart

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Chemistry · L5 · Carbene Chemistry · flowchart

Quiz6 questions

Which best describes evaporation in terms of energy?

AEndothermic — it absorbs energy from its surroundingsBExothermic — it releases energy to its surroundingsCNo energy change happens at allDIt only happens at exactly 100°C

Chemistry

Chemistry · L2 · Energy in the Water Cycle

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Chemistry · L2 · Energy in the Water Cycle

Flowchart8 objects

Chemistry

Chemistry · L4 · Hess's Law calculations: cycles, scaling, and the Born–Haber cycle · flowchart

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Chemistry · L4 · Hess's Law calculations: cycles, scaling, and the Born–Haber cycle · flowchart

Flowchart13 objects

Chemistry

Chemistry · L5 · Flow Chemistry and Continuous Processing · flowchart

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Chemistry · L5 · Flow Chemistry and Continuous Processing · flowchart

Quiz6 questions

For the equilibrium Ag₂CrO₄(s) ⇌ 2 Ag⁺(aq) + CrO₄²⁻(aq), which is the correct Ksp expression?

AK_{sp} = [\text{Ag}^+][\text{CrO}_4^{2-}]BK_{sp} = [\text{Ag}^+]^2[\text{CrO}_4^{2-}]CK_{sp} = 2[\text{Ag}^+][\text{CrO}_4^{2-}]DK_{sp} = [\text{Ag}_2\text{CrO}_4][\text{Ag}^+]^2[\text{CrO}_4^{2-}]

Chemistry

Chemistry · L4 · Solubility Equilibria (Ksp) — 6 Q

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Chemistry · L4 · Solubility Equilibria (Ksp) — 6 Q

Note~683 words · 3 min

Solubility equilibria: Ksp, the common ion effect, and precipitation Many ionic compounds are only sparingly soluble in water: a small amount dissolves, and the rest remains as undissolved solid in equilibrium with its dissolved ions. This

Chemistry

Chemistry · L4 · Solubility Equilibria: Ksp, common ion effect, and precipitation

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Chemistry · L4 · Solubility Equilibria: Ksp, common ion effect, and precipitation

MoleculeO=O

Chemistry

Chemistry · L2 · Oxygen (O₂)

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Chemistry · L2 · Oxygen (O₂)

MoleculeCC(=O)O

Chemistry

Chemistry · L2 · Acetic Acid (Vinegar)

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Chemistry · L2 · Acetic Acid (Vinegar)

Flowchart19 objects

Chemistry

Chemistry · L5 · Ultrafast Femtochemistry · flowchart

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Chemistry · L5 · Ultrafast Femtochemistry · flowchart

Collection4 items

01Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step

02Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step

03Chemistry · L3 · Bucket Brigade Analogy for the Rate-Determining Step

+1 more

Chemistry

Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step

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Chemistry · L3 · Reaction Mechanisms and the Rate-Determining Step

Collection4 items

01Chemistry · L5 · Metal-Organic Frameworks

02Chemistry · L5 · Metal-Organic Frameworks

03Chemistry · L5 · Isoreticular Expansion of a MOF Series

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Chemistry

Chemistry · L5 · Metal-Organic Frameworks

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Chemistry · L5 · Metal-Organic Frameworks

Note~473 words · 2 min

How Batteries Work A simple battery can be made from two DIFFERENT metals — like zinc and copper — both dipped into an electrolyte: a liquid that can carry a charge. Salty water works, lemon juice works, and even the juice inside a potato w

Chemistry

Chemistry · L2 · How Batteries Work

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Chemistry · L2 · How Batteries Work

Flowchart7 objects

Chemistry

Chemistry · L1 · Lemon Juice Ink, Step by Step

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Chemistry · L1 · Lemon Juice Ink, Step by Step

Quiz5 questions

Why do we sort rubbish into different bins?

ATo make more rubbishBSo each material can be recycled properlyCBecause it looks tidyDAll bins are the same anyway

Chemistry

Chemistry · L1 · Sorting and Recycling Materials

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Chemistry · L1 · Sorting and Recycling Materials

Flashcards10 cards

What two quantities define a dipole moment, and why is it a vector?1 / 10

Magnitude (μ = Q·d — the separated charge times the distance between the charges, in debye D) AND direction (from the partial positive end toward the partial negative end). Because it has both, bond dipoles must be added head-to-tail as vectors, not just summed as magnitudes.

Chemistry

Chemistry · L4 · Intermolecular Forces & Molecular Polarity

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Chemistry · L4 · Intermolecular Forces & Molecular Polarity

Quiz5 questions

What is the molecular ion produced by electron impact (EI) ionization, and what is distinctive about it?

AM+., an odd-electron radical cation whose m/z equals the compound's nominal molecular weightBM2+, an even-electron dicationCM-, an anion formed by electron captureDA neutral fragment with no charge at all

Chemistry

Chemistry · L4 · Mass Spectrometry Fragmentation — 5 Q

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Chemistry · L4 · Mass Spectrometry Fragmentation — 5 Q

Note~431 words · 2 min

Acid–base equilibria: pH, buffers, and Ka Acid–base chemistry governs a vast range of biological, industrial, and environmental processes. Two complementary definitions frame the subject: Brønsted–Lowry (proton transfer) and Lewis (electron

Chemistry

Chemistry · L4 · Acid–base equilibria: pH, buffers, and Ka

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Chemistry · L4 · Acid–base equilibria: pH, buffers, and Ka

Collection4 items

01Chemistry · L2 · Natural pH Indicators

02Chemistry · L2 · Natural pH Indicators

03Chemistry · L2 · Making Red Cabbage Indicator at Home

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Chemistry

Chemistry · L2 · Natural pH Indicators

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Chemistry · L2 · Natural pH Indicators

Note~1099 words · 5 min

Integrated rate laws: concentration, time, half-life, and linearization A single set of concentration-vs-time measurements from one experiment can pin down BOTH the reaction order and the rate constant k — without running a whole series of

Chemistry

Chemistry · L4 · Integrated Rate Laws: concentration-time relationships, half-lives, and linearization

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Chemistry · L4 · Integrated Rate Laws: concentration-time relationships, half-lives, and linearization

Collection11 items

01Chemistry · L4 · Organic Chemistry II — The Oxidation Ladder

02Chemistry · L4 · Organic Chemistry II — Carboxylic Acid Strength & Esterification

03Chemistry · L4 · The oxidation ladder: alcohols → aldehydes/ketones → carboxylic acids

+8 more

Chemistry

Chemistry · L4 · Organic Chemistry II

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Chemistry · L4 · Organic Chemistry II

Flowchart13 objects

Chemistry

Chemistry · L5 · Chemical Biology and Activity-Based Probes · flowchart

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Chemistry · L5 · Chemical Biology and Activity-Based Probes · flowchart

Flowchart9 objects

Chemistry

Chemistry · L3 · Fission vs Fusion

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Chemistry · L3 · Fission vs Fusion

Note~855 words · 4 min

Gibbs free energy: the four cases, the crossover point, and the road to K This note assumes you already have ΔG = ΔH − TΔS and the idea that ΔG < 0 means spontaneous. Here we go further: work through the reasoning behind all four ΔH/ΔS sign

Chemistry

Chemistry · L4 · Gibbs free energy: the four cases, the crossover point, and the road to K

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Chemistry · L4 · Gibbs free energy: the four cases, the crossover point, and the road to K

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