In carbonate hardness cations are ans. Mg2+ Ca2+ Both Ca2+ & Mg2+ Na+
Question
In carbonate hardness cations are ans. Mg2+
Ca2+
Both Ca2+ & Mg2+
Na+
Solution
The answer is "Both Ca2+ & Mg2+". Carbonate hardness refers to the amount of calcium (Ca2+) and magnesium (Mg2+) ions present in water. These ions interact with carbonate (CO3 2-) and bicarbonate (HCO3-) ions in the water to form calcium carbonate and magnesium carbonate, which are the sources of 'hardness'. Sodium ions (Na+) do not contribute to carbonate hardness.
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In carbonate hardness cations are ans. Mg2+ Na+ Ca2+ Both Ca2+ & Mg2+
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