Question

evaluate the option, ion exchange resins can be used to remove temporary hardness?​

Answer 1

Ion-exchange resins can also soften water that has temporary hardness as well as water that has permanent hardness. ... Dishwashers contain ion-exchange resin to soften the water. The resin needs recharging with dishwasher salt (sodium chloride) once it becomes full of calcium ions.

Answer 2

Answer:

Ion-exchange resins can also soften water that has temporary hardness as well as water that has permanent hardness. The resin is made into small balls around 1-2 mm in diameter, which are packed into a tube or ‘column’.

The ion-exchange resin starts with sodium ions stuck to it. As the hard water passes through the column, sodium ions come off the resin and go into the water, while calcium ions come out of the water and stick to the resin. In effect, calcium ions that cause hardness are swapped for sodium ions that do not cause hardness.

Dishwashers contain ion-exchange resin to soften the water. The resin needs recharging with dishwasher salt (sodium chloride) once it becomes full of calcium ions.

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