Calculate the change in pH after adding 0.25 mol of hydrochloric acid to a liter of a buffer solution containing 0.9 M concentrations each of ammonia and ammonium chloride. The pKa of ammonia is 9.26 at 25°C. Report your answer to two decimal places. If the pH will increase, enter the pH change with no sign (positive or negative). If the pH will decrease, enter the pH change with a negative sign.

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Calculate the change in pH after adding 0.25 mol of hydrochloric acid to a liter of a
buffer solution containing 0.9 M concentrations each of ammonia and ammonium
chloride. The pKa of ammonia is 9.26 at 25°C. Report your answer to two decimal
places.
If the pH will increase, enter the pH change with no sign (positive or negative). If the
pH will decrease, enter the pH change with a negative sign.
Transcribed Image Text:Calculate the change in pH after adding 0.25 mol of hydrochloric acid to a liter of a buffer solution containing 0.9 M concentrations each of ammonia and ammonium chloride. The pKa of ammonia is 9.26 at 25°C. Report your answer to two decimal places. If the pH will increase, enter the pH change with no sign (positive or negative). If the pH will decrease, enter the pH change with a negative sign.
Calculate the pH of a buffer solution prepared with 0.06 M sodium borate and 0.045
M boric acid? The pKa of boric acid is 9.24 at 25°C. Report your answer to 2 decimal
places.
Your Answer:
Transcribed Image Text:Calculate the pH of a buffer solution prepared with 0.06 M sodium borate and 0.045 M boric acid? The pKa of boric acid is 9.24 at 25°C. Report your answer to 2 decimal places. Your Answer:
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