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Ca · Mg · START WITH SOMETHING FAMILIAR
What would an electrical reading reveal about its dissolved ingredients?
A clear bottle can carry a chemical story of water interacting with minerals. Calcium and magnesium are especially relevant to hardness. Read a composition label as a set of separate claims about constituents, then ask which of those claims a conductivity meter could test. A single combined reading cannot reproduce the whole label. Use the bottle to compare kinds of evidence: stated composition, a measured electrical response and a particle model each reveal something different.
Follow this connection →CHANGE A CONDITION · COMPARE THE RESPONSE
| Applied voltage (V) | Current |
|---|---|
| 0.00 | 0.00 |
| 0.17 | 0.17 |
| 0.33 | 0.33 |
| 0.50 | 0.50 |
| 0.67 | 0.67 |
| 0.83 | 0.83 |
| 1.00 | 1.00 |
25 °C, supplied conductivity, ideal resistive response. No concentration-to-conductivity conversion is assumed.