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Author Question: What mass of sodium fluoride must be added to 250. mL of a 0.100 M HF solution to give a buffer ... (Read 6 times)

tspaw0811

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on: Nov 5, 2023

Question 1

What mass of ammonium nitrate must be added to 350. mL of a 0.150 M solution of ammonia to give a buffer having a pH of 9.00?  (Kb(NH3) = 1.8 × 10–5)
◦ 7.6 g
◦ 2.4 g
◦ 5.4 g
◦ 11 g
◦ 3.3 g

Question 2

What mass of sodium fluoride must be added to 250. mL of a 0.100 M HF solution to give a buffer solution having a pH of 3.50?  [Ka(HF) = 7.1 × 10–4]
◦ 0.49 g
◦ 1.5 g
◦ 3.4 g
◦ 2.3 g
◦ 0.75 g
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Marked as best answer by tspaw0811 on Nov 5, 2023

Jaclyn92G6

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Reply #1 on: Nov 5, 2023
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tspaw0811

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Reply 2 on: Nov 5, 2023
Thanks for the timely response, appreciate it

hollysheppard095

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Reply 3 on: Yesterday
Wow, this really help

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