Question

325 ml of a 0.0700M solution of sodium hydroxide reacts with 75,0 mL of a 0.115 M solution of cobalt (1) sulfate. What mass (ing) of cobalt (1) hydroxide( MM = 109.96) is formed assuming the reaction went to completion? NaOH(aq) + Co2(SO4)3(aq) --> Na2SO4(aq) + Co(OH)3(s) (unbalanced) Write answer to three significant figures.

Answer 1

1 = 9 DEL ACE + Ans 3 EXP 8 2 • 7 0 (1 6 Na OH (aps + Co, (son), (y) 200 (04)38) * 3 Naz Soy molar mass of NaOH = 40 g/mol. mole of NaOH: Mobarilyx Volume (d) vol= 325ml n. mole of Noon= 0.0100 mx 0.325 (1) 0.0227 mole of Co₂ (504) = 0.115m x 0.075l - 8.63610-3 6 moles of Naon reacts with Imole of Coz (604). 0.0227 noles of Naon will reach with _ x0.0227 33.768x103 As there are 8.63x163 moles of coz (S04), & Content is time to reagent. Srini * co, sou) is in excess Sinilily I mole of co(sou) reacts with 6 moles of Non is 0.63 x 103 moles of co(S04), will react with 6x0.63 x 103 = 0.05178

I Non 0.05178 moles As there are only 8.0 227 moles of Na on. * NaO11 is limiting reagent, 6moles of Naon gives 2 noles of Co Cond. 0.0227 moles of Naon will give 2 x 0.0227 27.566 xto 3 moles of Toi Colon): mass of to (on)e molex molar mans - 75 7x16 5x1o9. 7 3 109.96 -0.0329