Question

What volume, in mL, of 1.70 M HCN(aq) is needed to COMPLETELY NEUTRALIZE 100. mL of 1.45 M Ba(OH)₂(aq) ?

42.6 mL

6.15×10² mL

85.3 mL

1.71×10² mL

6.93×10² mL

Answer 1

Balanced reaction 2 HCN (aq) + Ba(OH)₂ (ap) Bo (CN)₂ (aq) + 2404, HCN acid m = 1.70m V = ? n = Coefficient of HEN In = 2 Ва (он), Бала My = 1.45M ₂ = 100.ml Az = Coefficient of Balon A -1 At equivalence point - Mivi - and - M, Vz n2 => V M2 Van, R₂m, (1.4 SM ( 100.mL) (2) 2 (1) 1 1.7om) 2 1.71X10 mL 1.71x10 mL