Which of the following pairs of ions causes h | vedclass

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(B) Hardness in water is primarily caused by the presence of dissolved calcium $(Ca^{2+})$ and magnesium $(Mg^{2+})$ ions.Temporary hardness is caused

Vedclass · Accepted Answer

$Ca^{2+}, HCO_3^-$

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(B) Hardness in water is primarily caused by the presence of dissolved calcium $(Ca^{2+})$ and magnesium $(Mg^{2+})$ ions.Temporary hardness is caused by the presence of bicarbonates $(HCO_3^-)$ of calcium or magnesium.Permanent hardness is caused by the presence of chlorides $(Cl^-)$ and sulfates $(SO_4^{2-})$ of calcium and magnesium.Among the given options,the pair $(Ca^{2+}, HCO_3^-)$ is responsible for temporary hardness in water.

Which of the following pairs of ions causes hardness in water?

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