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Chemistry: explore STEM content (page 2 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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Flowchart13 objects

Chemistry

Chemistry · L4 · EDTA Complexometric Titration · flowchart

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Chemistry · L4 · EDTA Complexometric Titration · flowchart

Flowchart13 objects

Chemistry

Chemistry · L2 · The Squeaky Pop Test for Hydrogen

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Chemistry · L2 · The Squeaky Pop Test for Hydrogen

Quiz6 questions

Which of the following species is a Lewis acid but NOT a Brønsted acid?

AHClBCH₃COOHCBF₃DH₂SO₄

Chemistry

Chemistry · L4 · Lewis Acids and Bases

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Chemistry · L4 · Lewis Acids and Bases

Flowchart7 objects

Chemistry

Chemistry · L2 · How Filtration Works

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Chemistry · L2 · How Filtration Works

Flowchart18 objects

Chemistry

Chemistry · L2 · From Fiber to Fabric Choice

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Chemistry · L2 · From Fiber to Fabric Choice

Quiz6 questions

Which two gases are chiefly responsible for acid rain?

ACarbon dioxide and oxygenBSulfur dioxide and nitrogen oxidesCMethane and hydrogenDOzone and helium

Chemistry

Chemistry · L3 · Acid Rain

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Chemistry · L3 · Acid Rain

Flowchart12 objects

Chemistry

Chemistry · L4 · Reaction energy profile: activation energy and catalysis

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Chemistry · L4 · Reaction energy profile: activation energy and catalysis

Flashcards10 cards

How do you test for oxygen gas?1 / 10

Put a glowing splint into the gas. If it relights into a flame, the gas is oxygen.

Chemistry

Chemistry · L2 · Testing for Gases

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Chemistry · L2 · Testing for Gases

Flowchart14 objects

Chemistry

Chemistry · L5 · Metal-Catalyzed Diazo Decomposition to a Carbenoid

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Chemistry · L5 · Metal-Catalyzed Diazo Decomposition to a Carbenoid

Flashcards10 cards

What flame colour does a lithium salt give, and which other common metal ion gives the exact same colour?1 / 10

Red (crimson). Strontium salts give the same red colour, so flame colour alone cannot tell the two apart.

Chemistry

Chemistry · L3 · Flame Tests & Ion Tests

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Chemistry · L3 · Flame Tests & Ion Tests

Collection5 items

01Chemistry · L3 · Limiting Reagents and Percent Yield

02Chemistry · L3 · Limiting Reagents and Percent Yield

03Chemistry · L3 · From Reactants to Percent Yield

+2 more

Chemistry

Chemistry · L3 · Limiting Reagents and Percent Yield

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Chemistry · L3 · Limiting Reagents and Percent Yield

Note~266 words · 1 min

Mixtures vs. Solutions When you stir two or more things together without making anything new, you have made a mixture. But not all mixtures look the same. Cookie Dough: A Mixture You Can See Picture chocolate chip cookie dough. You mixed th

Chemistry

Chemistry · L1 · Mixtures vs. Solutions

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Chemistry · L1 · Mixtures vs. Solutions

Quiz6 questions

According to the spectrochemical series, which of these ligands produces the largest crystal field splitting energy Δo?

AI⁻BH₂OCNH₃DCN⁻

Chemistry

Chemistry · L5 · Ligand Field Theory

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Chemistry · L5 · Ligand Field Theory

MoleculeO=C=O

Chemistry

Chemistry · L2 · Carbon Dioxide (CO₂)

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Chemistry · L2 · Carbon Dioxide (CO₂)

Flashcards11 cards

What is the ideal gas law, and what does each symbol represent?1 / 11

P = pressure (atm), V = volume (L), n = amount of gas (mol), T = absolute temperature (K), R = the gas constant. It combines Boyle's law (P ∝ 1/V), Charles's law (V ∝ T), and Avogadro's law (V ∝ n) into one relationship — each of those laws is just PV = nRT with two of the four variables held fixed.

Chemistry

Chemistry · L4 · Real Gases & the Ideal Gas Law

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Chemistry · L4 · Real Gases & the Ideal Gas Law

Flowchart13 objects

Chemistry

Chemistry · L5 · Jahn–Teller Distortion Pathway (d⁹ Cu²⁺)

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Chemistry · L5 · Jahn–Teller Distortion Pathway (d⁹ Cu²⁺)

Flashcards10 cards

What are the three main states of matter?1 / 10

Solid, liquid, and gas.

Chemistry

Chemistry · L1 · Solid, Liquid, or Gas?

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Chemistry · L1 · Solid, Liquid, or Gas?

Note~259 words · 1 min

Colours Change All Around Us Look closely and you'll spot colour changes everywhere — on nails, fruit, toast, and even leaves. A shiny iron nail left outside slowly turns orange-brown. That colour change is called rust. It happens when iron

Chemistry

Chemistry · L1 · Colours That Change

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Chemistry · L1 · Colours That Change

Collection7 items

01Chemistry · L2 · Solute, Solvent, and Solution

02Chemistry · L2 · Saturation, Temperature, and Concentration

03Chemistry · L2 · Solubility and Solutions

+4 more

Chemistry

Chemistry · L2 · Solubility and Solutions

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Chemistry · L2 · Solubility and Solutions

Flashcards11 cards

Give the formula for the crystal field stabilization energy (CFSE) of an octahedral complex in terms of the number of electrons in t2g and eg.1 / 11

n(t2g) and n(eg) are the electron counts in the lower and upper octahedral sets. Each t2g electron is stabilized by 0.4Δo (often written −2/5 Δo) below the barycenter, and each eg electron is destabilized by 0.6Δo (+3/5 Δo) above it — the two sets are weighted so the barycenter (average energy if the five d-orbitals were degenerate) is preserved: 3×(−0.4) + 2×(+0.6) = 0.

Chemistry

Chemistry · L5 · Crystal Field Stabilization Energy

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Chemistry · L5 · Crystal Field Stabilization Energy

Note~725 words · 4 min

Colorimetry and the Beer-Lambert law Colorimetry determines the concentration of a coloured species by measuring how much light of a chosen wavelength it absorbs. The whole technique rests on one proportionality — the Beer-Lambert law — con

Chemistry

Chemistry · L4 · Colorimetry and the Beer-Lambert law

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Chemistry · L4 · Colorimetry and the Beer-Lambert law

Note~593 words · 3 min

Six-Electron Carbon: Singlet and Triplet Carbenes A carbene carbon has only six valence electrons — two fewer than a normal tetravalent carbon — with two non-bonding electrons left over. Those two electrons can pair up in a single orbital (

Chemistry

Chemistry · L5 · Carbene Chemistry

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Chemistry · L5 · Carbene Chemistry

Note~312 words · 2 min

Squeeze It, Heat It: How Gases Respond A trapped gas behaves in very predictable ways when you squeeze it or heat it. Two simple rules — Boyle's Law and Charles's Law — describe almost everything you need for calculations at this level. Boy

Chemistry

Chemistry · L3 · Gas Laws

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Chemistry · L3 · Gas Laws

Flowchart9 objects

Chemistry

Chemistry · L1 · Sour or Soapy? Acids and Bases in the Kitchen · flowchart

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Chemistry · L1 · Sour or Soapy? Acids and Bases in the Kitchen · flowchart

Flowchart11 objects

Chemistry

Chemistry · L3 · Rate vs Concentration: Determining Order

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Chemistry · L3 · Rate vs Concentration: Determining Order

Note~477 words · 2 min

Nature's Own pH Indicators You already know that litmus paper and universal indicator change colour to show acid or base. It turns out some plants make their own colour-changing pigments too — no laboratory required. Red Cabbage Juice — A H

Chemistry

Chemistry · L2 · Natural pH Indicators

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Chemistry · L2 · Natural pH Indicators

Flowchart12 objects

Chemistry

Chemistry · L5 · Isotope Labeling and Tracer Studies · flowchart

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Chemistry · L5 · Isotope Labeling and Tracer Studies · flowchart

Collection5 items

01Chemistry · L3 · Combustion and Cracking of Hydrocarbons

02Chemistry · L3 · Combustion and Cracking of Hydrocarbons

03Chemistry · L3 · Complete vs Incomplete Combustion

+2 more

Chemistry

Chemistry · L3 · Combustion and Cracking of Hydrocarbons

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Chemistry · L3 · Combustion and Cracking of Hydrocarbons

Flashcards10 cards

Describe the shape of a strong-acid/strong-base titration curve, and state the pH at the equivalence point.1 / 10

The curve starts at a low pH, rises gradually, then shows a very steep, near-vertical jump through the equivalence point, before leveling off at high pH. Because the reaction produces only a neutral salt (e.g. NaCl from HCl + NaOH — neither ion hydrolyses), the equivalence point sits at exactly pH = 7.00 at 25 °C.

Chemistry

Chemistry · L4 · Acid-Base Titration Curves & Indicator Selection

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Chemistry · L4 · Acid-Base Titration Curves & Indicator Selection

Flowchart5 objects

Chemistry

Chemistry · L3 · Combustion and Cracking of Hydrocarbons · flowchart

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Chemistry · L3 · Combustion and Cracking of Hydrocarbons · flowchart

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