We are asked to find the pH of the equivalence point(s) and the volume (mL) of 0.447 M HNO_{3} needed to reach the point in titration of 2.65 L of 0.0750 M pyridine (C_{5}H_{5}N)

Step 1. Calculate mole pyridine (C_{5}H_{5}N)

$\frac{\mathbf{0}\mathbf{.}\mathbf{0750}\mathbf{}\mathbf{mol}\mathbf{}{\mathbf{C}}_{\mathbf{5}}{\mathbf{H}}_{\mathbf{5}}\mathbf{N}}{\mathbf{1}\overline{)\mathbf{}\mathbf{L}}\mathbf{\hspace{0.17em}}}\mathbf{\times}\mathbf{2}\mathbf{.}\mathbf{65}\overline{)\mathbf{}\mathbf{L}}\mathbf{\hspace{0.17em}}$

**= 0.19875 mol C _{5}H_{5}N**

Step 2. Calculate the volume of 0.447 M HNO_{3}

at equivalence point:

mol base = mol acid

mol C_{5}H_{5}N = mol HNO_{3}

$\mathbf{0}\mathbf{.}\mathbf{19875}\mathbf{}\overline{)\mathbf{mol}\mathbf{}{\mathbf{HNO}}_{\mathbf{3}}}\mathbf{}\mathbf{\times}\mathbf{}\frac{\mathbf{1}\mathbf{}\mathbf{L}}{\mathbf{0}\mathbf{.}\mathbf{447}\mathbf{}\overline{)\mathbf{mol}\mathbf{}{\mathbf{HNO}}_{\mathbf{3}}}\mathbf{}}$

**= 0.445 L**

Step 3. Calculate molarity C_{5}H_{5}NH^{+}

C_{5}H_{5}N + H^{+} → C_{5}H_{5}NH^{+}

This will act as a weak acid in the solution:

C_{5}H_{5}NH^{+} + H_{2}O → C_{5}H_{5}N + H_{3}O^{+}

Find the pH of the equivalence point(s) and the volume (mL) of 0.447 M HNO_{3} needed to reach the point(s) in titrations of

(a) 2.65 L of 0.0750 M pyridine (C_{5}H_{5}N)

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Weak Base Strong Acid Titrations concept. You can view video lessons to learn Weak Base Strong Acid Titrations. Or if you need more Weak Base Strong Acid Titrations practice, you can also practice Weak Base Strong Acid Titrations practice problems.

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Based on our data, we think this problem is relevant for Professor Lewis' class at University of Wisconsin - Eau Claire.

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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.