Chemistry · Equilibria involving physical processes: Solid-liquid, liquid-gas, gas-gas and solid-gas equilibria, Henry's law, General characteristics of equilibrium involving physical processes
Which of the following processes is unsuitable for softening water possessing te
Which of the following processes is unsuitable for softening water possessing temporary hardness?
- A. Adding calcium hydroxide
- B. Filtration
- C. Boiling
- D. Distillation
Step-by-step solution
Temporary hardness is due to dissolved bicarbonates of calcium and magnesium. Softening requires removal of these ions, which can be achieved by boiling (precipitation), adding calcium hydroxide (chemical precipitation), or distillation (evaporation-condensation). Filtration only removes suspended solids and does not affect dissolved ions, making it unsuitable for softening.
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