Q3) Circle the most appropriate answer? [12] 1) A 1.26 g salt mixture of BaCl2.2H20 (244.2 g/mol) and Na3PO4.12H20 (380.

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Q3 Circle The Most Appropriate Answer 12 1 A 1 26 G Salt Mixture Of Bacl2 2h20 244 2 G Mol And Na3po4 12h20 380 1 (63.41 KiB) Viewed 34 times

Q3) Circle the most appropriate answer? [12] 1) A 1.26 g salt mixture of BaCl2.2H20 (244.2 g/mol) and Na3PO4.12H20 (380.2 g/mol) was dissolved in 150 mL hot water. The white precipitate, Ba3(PO4)2 (602 g/mol) was found to be 0.28 g. Calculate the percentage of Na3PO4.12H20 in the mixture given that BaCl2.2H2O is the limiting reactant? (A) 72.9% (B) 79.5 % (C) 12.4 % (D) 84.4 % 2) A 1.38 g of K Cr(SO4)2.12H20 was heated until reach a constant mass. Calculate the mass in grams of the residue KCr(SO4)2 ? (H20 = 18.0 g/mol, KCr(SO4)2 = 283.2 g/mol) (A) 1.03 (B) 0.64 (C) 0.78 (D) 0.10 3) The net ionic equation for the reaction between NaOH and HCl is: (A) H+ (aq) + OH(aq) - H20 (1) (B) Na2CO3 (aq) → CO2(9 +H2O (C) CO2 (aq) (aq) → H2O0) + CO2(%) (D) HCl(aq) - H(aq) + CIB) + 2H + 4) Which of the following pair of solutions will form precipitate while mix together? (A) KNO3 and Na2CO3 (B) NaCl and Fe(NO3)3 (C) AgNO3 and NaNO3 (D) Na2SO4 and Ba(NO3)2