ANOTHER BUFFER QUESTION

Question

1 QUESTIOIN///

A FORMIC ACID BUFFER CONTAINIG 0.50 M HCOOH ABD 0.50 M HCOONa IS PREPARED BEFORE TITRATION(Ka HCOOH=1.8X10^-4) WHAT IS THE pH AFTER THE ADDITION OF 10.0 mL OF 0.100 M NaOH TO THE 100.0mL BUFFER?

2 QUESTION//

Use the following thermodynamic data

Species---ΔH°(kJ/mol)------S°(J/K mol)

H2O2(l) -187.78--------- 109.6

H2O(l) -285.83---------- 69.91

O2(g) 0--------------- 205.14

to calculate ΔS°univ for the decomposition of hydrogen peroxide at 25.0°C.

2 H2O2(l) → 2 H2O(l) O2(g)

a.-783.8 J/K

b.-531.9 J/K

c. 494.2 J/K

d. 783.8 J/K

e. 3741 J/K

Answer 1

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