Calculate the pH of each two-component solution: a. 0.265 M HNO3 and 0.102 M HCN b. 0.115M NaClO2 and 0.0500M NH3 c. 0.265M HNO2 and 0.350 M NaOH
a) 0.265 M HNO3 and 0.102 M HCN
HNO3 is strong acid and HCN is the weak acid. so pH depends on HNO3
pH = -log [H+]
pH = -log (0.265)
pH = 0.578
b) 0.115M NaClO2 and 0.0500M NH3
[OH-] = sqrt (Kb1 x C + Kb2 x C )
= sqrt (5.6 x 10^-4 x 0.115 + 1.8 x 10^-5 x 0.0500 )
= 8.03 x 10^-3 M
pOH = 2.10
pH + pOH = 14
pH = 11.90
c) 0.265M HNO2 and 0.350 M NaOH
NaOH left = 0.350 -0.265
= 0.085 M
pOH = 1.07
pH + pOH = 14
pH = 12.93
Calculate the pH of each two-component solution: a. 0.265 M HNO3 and 0.102 M HCN b....
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