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Look at your mineral water label

Look at your mineral water label. Where do the dissolved minerals come from? How do you think the minerals affect the water?. Hard Water. We are learning to: appreciate the problems associated with hard water areas. use observation skills during a practical. Scum and Scale.

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Look at your mineral water label

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  1. Look at your mineral water label Where do the dissolved minerals come from? How do you think the minerals affect the water?

  2. Hard Water We are learning to: appreciate the problems associated with hard water areas. use observation skills during a practical.

  3. Scum and Scale Scum: formed when soap reacts with hard water. You need much more soap to make a lather with hard water, because it reacts with the calcium and magnesium ions in the hard water. Calcium stearate and magnesium stearate (scum) Sodium Stearate (soap) Ca2+ and Mg2+ ions (from hard water) + Na+ ions (soluble in water)  +

  4. Scum and Scale Scale: formed when hard water is boiled. Limescale can build up in kettles and heating systems. It makes them less efficient because limescale doesn’t conduct heat. CaCO3 (limescale) H2O (water) Ca2+ (from hard water) 2HCO3- + CO2 (carbon dioxide) +  +

  5. What sort of problems would hard water cause in the home?

  6. Hard Water We are learning to: appreciate the problems associated with hard water areas. use observation skills during a practical.

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