Question

Calculate the number of grams of sodium in 9.2 g of each of the following sodium-containing food additives. Na3PO4 (sodium phosphate), NaC7H5O2 (sodium benzoate), Na2C6H6O7 (sodium hydrogen citrate).

Answer 1

Mass of Na, Poy = 9.2g Mokes of Na₂ po y = mass of Na poy (g) Molar mass of Nag Pou (9/91) = 9. 28 = 0.056 mol 164 gimot Moles of Na = 3x MAG of Napou = 3x0.056 = 0.168ml Mars of Na - moles of Nax Molar mass of Na = 0.168 X 23 = 13.879m Mass of Na ChsO₂ = 9.2g moles of NaC H₂O = 9.2 g Molar mass of Nalush gland . 9.2 - 0.064 m of iyu Moles of Na - Moles of Nacy Hg 0₂ Mas of Na= moles of Nax Molon mass of na - 0.064 X238

Mass of NQCG Hg Oy 9.2g Moles of Na, CQ460 9.2 r. Molon mass of Na₂C6H60, (gload) a = 0.03898 mol Moles of Na = 2xmoles of Na, C6H6o7 = 0.07796 mol Ja Moles of Nax Molon Mass of Na = 9:29