1.

Versene, a chelating agenthaving chemical formula C_(2)H_(4)N_(2)(C_(2)H_(4)O_(2)Na)_4. If each mole of this compound could bind 1 mole fo Ca^(2+), then the rating of pure versene expressed as mg of CaCO_(3) bound per g of chelating agent is

Answer»

100 mg
163 mg
200 mg
263 mg

Solution :1 mole `CA^(2+) = 1` mole `CaCO_(3) = 100G`
RATING = mg of `CaCO_(3)` needed per g chelating agent
mol. Wt` =380 = (100 xx 10^(3))/(380) = 263 mg`


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