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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 132 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
Chemistry ¦ Chang, Goldsby ¦ 11th Edition
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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
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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tspaw0811

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Reply 2 on: Nov 5, 2023
Gracias!

debra928

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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