10. (4 points) The diagram below is a titration curve for a.. Your job for this

Question

10. (4 points) The diagram below is a titration curve for a.. Your job for this question is, based upon the curve and the supplies available, identify what's.. Please remember to calculate the volume at the equivalence point, and fill in the blanks in both diagrams. weak aeid wilth a strong bas OR 2 weak base with strong aci weak base with a strong aci a) in the flask, b) in the buret, c) the pH at the equivalence point and d) the pH at the half equivalence point Supplies Available 20 mL of 0.30 M HC,H,02 0.15 M NaOH 20 mL of 0.30 M NH 0.15 M HCI K.(HC,H,O)1.8x10 K, (NH) 1.8x10 pH 1 volume at

Explanation / Answer

Titration curve is for a weak base with a strong acid.

a) In the Flask - 20 mL of 0.3 M NH3

b) In the Buret - 0.15 M HCl

c) At the equivalence point,

Moles of HCl = Moles of NH3

0.15 x V = 20 x 0.3

V = 40 mL

pH = 7

d) At half equivalence point,

pOH = pKb = - log (1.8 x 10-5)

pH = 14 - pOH = 14 - 4.745

pH = 9.255

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