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100 mL of a 275 mM sodium phosphate buffer containing 2.75 mM MgCl2 at pH 7.5 will be prepared. The ff. will be available:phosphoric acid(15M), monosodium phosphate(FW 137.99), disodium phosphate(FW 174.20), trisodium phosphate(FW 380.12) and MgCl2(FW 203.30)

a.) Calculate the mass of reagents required to prepare 100 mL of a 275 mM solution of monobasic phosphate and 100 mL of a 275 mM solution of dibasic phosphate, each containing 2.75 mM MgCl2

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