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2. Water softening - Wikipedia

   en.wikipedia.org/wiki/Water_softening

   Water softening. Idealized image of water softening process involving replacement of calcium ions in water with sodium ions donated by a cation-exchange resin. Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is ...

3. Hard water - Wikipedia

   en.wikipedia.org/wiki/Hard_water

   Hard water. A bathtub faucet with built-up calcification from hard water in Southern Arizona. Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates ...

4. Dishwasher - Wikipedia

   en.wikipedia.org/wiki/Dishwasher

   A dishwasher containing clean dishes. A dishwasher is a machine that is used to clean dishware, cookware, and cutlery automatically. Unlike manual dishwashing, which relies on physical scrubbing to remove soiling, the mechanical dishwasher cleans by spraying hot water, typically between 45 and 75 °C (110 and 170 °F), at the dishes, with lower temperatures of water used for delicate items.

5. Whirlpool - Wikipedia

   en.wikipedia.org/wiki/Whirlpool

   Whirlpool. The Gulf of Corryvreckan whirlpool in Scotland is the third-largest whirlpool in the world. A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. [1] [clarification needed] Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be ...

6. How to Wash Potatoes to Actually Get Them Clean, According to ...

   www.aol.com/wash-potatoes-actually-them-clean...

   Fill a bowl or clean sink basin with 3 parts cool water and 1 part distilled white vinegar. Place the small potatoes in the water, and let them soak for 5 minutes. Using a vegetable brush ...

7. Grain per gallon - Wikipedia

   en.wikipedia.org/wiki/Grain_per_gallon

   Grain per gallon. The grain per gallon (gpg) is a unit of water hardness defined as 1 grain (64.8 milligrams) of calcium carbonate dissolved in 1 US gallon of water (3.785412 L). It translates into 1 part in about 58,000 parts of water or 17.1 parts per million (ppm). Also called Clark degree (in terms of an imperial gallon).