Stuff you should know - Hard water

Pregunta	Respuesta
Temporary Hardness - How it's made -	Acid rain lands on chalk/limestone (CaCO3) H2CO3 + CaCO3 -> Ca(HCO3)2)
Temporary Hardness - How to remove -	Boiling, washing soda, and ion-exchange resin
Problems of Hard Water	Doesn't form a lather easily, instead forms scum, forms limescale when heated/boiled
Problems with limescale	Unsightly, blocks pipes and reduces heating efficiency as it is a good insulator. CaCO3
Washing Soda	Washing Soda (Sodium Carbonate) Calcium ions react with carbonate ions, forming an insoluble precipitate Softens both types
Ion exchange resin	Sodium Ions on the resin are exchanged for calcium ions Softens both types
Permanent Hardness	Magnesium sulfate and calcium sulfate dissolve in water

Resumen del Recurso

	Creado por m00072 hace más de 8 años