5.0 g of NaOH was added to 1.0 L of 1.0 M HNO 2 ( K a = 4.0 × 10 –4 ). How m...
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- 5.0 g of NaOH was added to 1.0 L of 1.0 M HNO2 (Ka = 4.0 × 10–4). How much more NaOH is needed to be added to achieve a pH of 3.00? [3 marks] g
- A 500 mL sample of the buffer created above was used to host a chemical experiment that had to be kept within a pH range of 2.9–3.2 to be considered ‘valid’. Over the course of the experiment, a total of 45 mL of a 0.1 M HCl solution was added to the buffer solution. What would the pH of the solution be at the end of the experiment? [2 marks]
- Would the experiment be considered ‘valid’ at the end of the experiment? [1 mark]
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