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🍵 Hard water, soft water and what it does to tea

Hardness is not just a kettle problem. Follow calcium, magnesium, alkalinity and tea compounds to learn why the same leaf tastes different from one water to another.

4
lessons
~20 min
to learn
🔬 Science
subject
Adults
level
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What you’ll learn

  1. What hardness meansDistinguish hardness, alkalinity, and dissolved solids.Hardness mainly counts calcium and magnesium, but water has several useful variables.
  2. Extraction and tasteExplain how water chemistry alters extraction and flavour.Minerals and buffering can change what the leaf releases.
  3. The cloudy cupSeparate scum, scale, colour, and flavour as observations.Visible haze should prompt investigation, not a simplistic verdict.
  4. Changing the waterDesign a controlled comparison and choose practical treatment.Filtering, bottled, and tap waters each have tradeoffs.

Questions this course answers

Which ions mainly define water hardness?

Hardness mainly measures dissolved calcium and magnesium.

Match each term to its role.

These describe different parts of the brewing system.

Put the comparison in order.

Control the tea first, then compare water and repeat.

Which property most directly buffers tea acids?

Hydrogen carbonate contributes alkalinity and can neutralize acidity.

Grounded in trusted sources

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