I need help with part 2 please Part 1 (1 point) See Periodic Table See Hint Matc

Question

I need help with part 2 please

Part 1 (1 point) See Periodic Table See Hint Match the provided labels to the appropriate point on the titration curve. Buffering region 14 12 10 Excess itrant Equivalence point olume of strong base (m) (1 point) See Hint Part 2 Use the titration curve for the weak acid to calculate the pH of a0.15 Msolution of that weak acid. Enter your answer with two significant figures. Round the pKa to the nearest whole number for the calculation, and use two significant figures for your final answer

Explanation / Answer

at point A, buffer capacity is maximum.

PH = PKa = 6.0

PKa = 6.0

this is weak acid.

so for weak acid we know,

PH = 0.5 * PKa - 0.5 * log C

PH = 0.5 * 6.0 - 0.5 * log (0.15)

PH = 3.0 + 0.4

PH = 3.4 (answer)

3.4 have two sig. fig.

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