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hard water
noun
- water that contains magnesium, calcium, or iron salts and therefore forms a soap lather with difficulty.
Notes
Example Sentences
“Soap doesn’t lather as well with hard water,” said Campbell.
She recommends it for tackling hard water stains, accidental hair dye stains, Kool-Aid stains on counters and stubborn rings around kitchen burners.
Yet stalagmites offer new insights into climate fluctuations because the German researchers could examine the isotopic composition of oxygen in a southern German stalagmite that had been formed from hard water.
In areas with hard water, repeated irrigation deposits minerals into the soil and onto the sides of the container.
As they evaporate and refill over time, Beeler said an alkali pool can be distinguished by a white ring — similar to hard water stains — that forms on exposed soil and rocks.
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