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Determine the pH during the titration of 24.8 mL of 0.475 M nitrous acid (Ka =...

Determine the pH during the titration of 24.8 mL of 0.475 M nitrous acid (Ka = 4.5×10-4) by 0.361 M NaOH at the following points.

(a) Before the addition of any NaOH __________

(b) After the addition of 8.20 mL of NaOH __________

(c) At the half-equivalence point (the titration midpoint) ________

(d) At the equivalence point __________

(e) After the addition of 48.9 mL of NaOH __________

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