A professor titrated 0.47 g of an unknown monoprotic weak acid with 0.0973 M NaOH. The titration...

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Chemistry

A professor titrated 0.47 g of an unknown monoprotic weak acidwith 0.0973 M NaOH.
The titration data is below.
a) Calculate # of moles of NaOH required to reach theequivalence point (endpoint).
b) Determine # of moles of acid titrated.
c) Calculate Molar mass of unknown acid.
d) determine the pK_a of the unknown acid.
e) Calculate the K_a of the unknown acid.
Volume
NaOH (mL) pH
0.00 2.73
2.00 3.30
4.00 3.64
6.00 3.86
8.00 4.03
10.00 4.18
12.00 4.32
14.00 4.46
16.00 4.60
18.00 4.76
20.00 4.94
22.00 5.18
23.00 5.35
23.50 5.47
24.00 5.60
24.50 5.81
25.00 6.18
25.50 10.30
26.00 11.02
27.00 11.44

Answer & Explanation Solved by verified expert

4.1 Ratings (491 Votes)

at equivalence point there is a sudden jump in pH so 25 is the equivalence point a we know that moles conc x volume L so moles of NaOH required 00973 x 25 x 103 24325 x See Answer

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Volume
NaOH (mL)		pH
0.00		2.73
2.00		3.30
4.00		3.64
6.00		3.86
8.00		4.03
10.00		4.18
12.00		4.32
14.00		4.46
16.00		4.60
18.00		4.76
20.00		4.94
22.00		5.18
23.00		5.35
23.50		5.47
24.00		5.60
24.50		5.81
25.00		6.18
25.50		10.30
26.00		11.02
27.00		11.44