A JOURNAL FOR THE CURIOUS
Good questions
deserve better
answers.
Why does copper behave differently in two acids? Why is steam so much larger than water? The best lessons start with a real question.
✳ Curious minds welcome. No question is too small.
FIG 001 / THE ART OF WHY
29CuCopper
01H+Hydrogen ion
≠
01Same metal. Different conditions.
A surprisingly good question.
A surprisingly good question.
THINK CLEARERASK THE NEXT QUESTIONFOLLOW THE EVIDENCE✳
EDITOR'S PICK / 001
Begin with a why.
CHEMISTRY / THE EXPLAINER FILES
Cu+H₂SO₄?
DILUTEvs.HOT & CONCENTRATED
CHEMISTRY • 8 MIN READ
Why doesn't copper react with dilute sulfuric acid?
A strong acid and a strong oxidizer aren't the same thing. Here's what actually happens to the electrons.
Read the explanation ↗THE NOTEBOOK
One question at a time.
Short lessons. Lasting understanding.
001Cu →? Cu²⁺ELECTRONS MAKE THE RULES
CHEMISTRY · 8 MIN
Why doesn't copper react with dilute sulfuric acid?
The difference between acidity and oxidizing power.
002
×1,700
IT'S ABOUT SPACEPHYSICS · 5 MIN
Why does water expand so much when it becomes steam?
A one-gram calculation that makes the number click.
0031³ + 2³ + 3³
= 6²A PATTERN WORTH PROVING
= 6²A PATTERN WORTH PROVING
MATHEMATICS · 6 MIN
Why is the sum of cubes always a perfect square?
A beautiful identity, with a proof you can remember.
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KEEP THE QUESTIONS COMING
The world gets more interesting
every time you ask why.
Thoughtful explanations from a Japan-based educator. More science, mathematics and curious detours on the way.
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