# Titrations: Weak Base-Strong Acid - Video Tutorials & Practice Problems

### Before the Equivalence Point

### Titrations: Weak Base-Strong Acid Example

Calculate the pH of the solution resulting from the mixing of 75.0 mL of 0.100 M NaC_{2}H_{3}O_{2} and 75.0 mL of 0.30 M HC_{2}H_{3}O_{2} with 0.0040 moles of HBr.

In order to create a buffer 7.321 g of potassium lactate is mix with 550.0 mL of 0.328 M lactic acid, HC_{3}H_{5}O_{3}. What is the pH of the buffer solution after the addition of 300.0 mL of 0.100 M hydrobromic acid, HBr? The K_{a} of HC_{3}H_{5}O_{3} is 1.4 × 10^{−}^{4}.

### At the Equivalence Point

### Titrations: Weak Base-Strong Acid Example

Consider the titration of 100.0 mL of 0.100 M CH_{3}NH_{2} with 0.250 M HNO_{3} at the equivalence point. What would be the pH of the solution at the equivalence point? The K_{b} of CH_{3}NH_{2} is 4.4 × 10^{−}^{4}.

### After the Equivalence Point

### Titrations: Weak Base-Strong Acid Example

A solution contains 100.0 mL of 0.550 M sodium nitrite, NaNO_{2}. Find the pH after the addition of 180.0 mL of 0.400 M HClO_{4}. The K_{a} of HNO_{2} is 4.6 × 10^{−4}.

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