What is the source of sulphates in water systems? Give reactions. What is temporary hardness of water? Give the reason of temporary hardness of water.

Sulfates in water systems typically come from natural sources or human activities. Here are some common sources and reactions associated with sulfates in water:

1. Natural Sources:

   • Minerals: Sulfates can be naturally present in water due to the dissolution of minerals containing sulfate ions. For example, minerals like gypsum (calcium sulfate) and anhydrite (calcium sulfate) can release sulfate ions into water sources.

   • Atmospheric Deposition: Sulfates can also enter water systems through atmospheric deposition. Sulfur dioxide (SO2) released into the atmosphere from volcanic eruptions, industrial processes, or combustion of fossil fuels can react with water ___ ________ ___ __________ _______ _________ _______ _______ _____ ____ __________ ___.
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