Answer:
2.What process is present when you filter water using muslin cloth?:
-Straining
Straining is a very simple method of filtration. In this process, water is poured through a piece of cloth, which removes some of the suspended silt and solids and destroys some pathogens.
3.What is left after boiling the mixture in a metal pan?:
As you boil away the water, these dissolved calcium/magnesium carbonates remain behind and their concentrations eventually become greater than their respective solubility limits.
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