The following is a titration curve for a monoprotic weak acid. 0.200 grams ofthe acid was dissolved in 50.00 mls of water and titrated with a 0.150 Msolution of NaOH.14.0013.0012.0011.0010.009.008.00pH 7.006.005.004.003.002.001.000.00Vol. Base (mL)What is the pKa of the acid?How many moles of acid were present?What is the molecular weight of the acid?What pH range should the indicator change color to determine the endpointof titration?Over what pH range is [HA]> [A]?00 0825.0000'000 000 900 0

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Asked Nov 20, 2019
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The following is a titration curve for a monoprotic weak acid. 0.200 grams of
the acid was dissolved in 50.00 mls of water and titrated with a 0.150 M
solution of NaOH.
14.00
13.00
12.00
11.00
10.00
9.00
8.00
pH 7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
Vol. Base (mL)
What is the pKa of the acid?
How many moles of acid were present?
What is the molecular weight of the acid?
What pH range should the indicator change color to determine the endpoint
of titration?
Over what pH range is [HA]> [A]?
00 08
25.00
00'0
00 0
00 9
00 0
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The following is a titration curve for a monoprotic weak acid. 0.200 grams of the acid was dissolved in 50.00 mls of water and titrated with a 0.150 M solution of NaOH. 14.00 13.00 12.00 11.00 10.00 9.00 8.00 pH 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 Vol. Base (mL) What is the pKa of the acid? How many moles of acid were present? What is the molecular weight of the acid? What pH range should the indicator change color to determine the endpoint of titration? Over what pH range is [HA]> [A]? 00 08 25.00 00'0 00 0 00 9 00 0

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Expert Answer

Step 1

a)

The half of the volume of titrant from origin to equivalence point corresponds to the point, where half of the acid is titrated or half of the acid got converted to its conjugate base. That is at this point concentration of acid and its conjugate base is same. And the pH correspon...

Tconjugate base
acid
pHpKg
4.5=pKog
4.5=pK log
pK 4.5
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Tconjugate base acid pHpKg 4.5=pKog 4.5=pK log pK 4.5

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