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Explain the Ion Exchange water Softening
Softening is usually done using a resin (natural or synthetic long chain chemical with a sodium ion attached). When water containing hardness ions is passed through the resin, the hardness ions (Ca, Mg) exchange with Na ions on the resin (thus the resulting water is free of hardness ions but high in sodium).
When the sodium ions on the resin are exhausted, the resin is regenerated using a brine solution (which replaces all hardness ions attached to the resin with Na ions again) and the resin can be used again.
Airport Lighting: Lighting of Approach to Runway A good system of identification of the runway when landing is to provide six transverse cross-bars of lights placed a
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Explain the Bridge Selection Criteria - Underwater inspection? Various factors influence the bridge selection criteria. As a minimum, all structures must receive routine underw
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The construction of a new bakery requires the property development firm to pay the municipality the cost to expand its sewage treatment plant. In addition to the expansion costs, t
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How muct the cost the Mettallis Strips?
Necessity of reinforcement in precast concrete manhole units Precast concrete manholes are generally constructed by placing the bases of manholes firstly. Walls of precast man
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