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Versene, a chelating agent having chemical formula C2H4(C2H2Na)4.If each mole of this compound culd bind 1 mole of Ca 2+ ,then the rating of pure versene expressed as mg of CaCo3 bound per g of chelating agent.
plzzz..reply urgently
molar mass of versene= 224 mass CaCO3
1 mole versene = i mole Ca2+ = 1 mole CaCO3
i.e 224 gm versene corresponds to 100 gm CaCO3
so 1 gm versene = 100/224 gm CaCO3
= 100/224 * 1000 mg of CaCO3
=446.428 per mg CaCO3 = rating
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