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Author Question: How many moles of HCl need to be added to 150.0 mL of 0.50 M NaZ to have a solution with a pH of ... (Read 52 times)

abern

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  • Posts: 533
on: Mar 21, 2021

Question 1

How many millimoles of HCl must be added to 100 mL of a 0.100 M solution of methylamine (pKb= 3.36) to give a buffer having a pH of 10.00?

◦ 8.1
◦ 18.7
◦ 20.0
◦ 41.5
◦ 12.7

Question 2

How many moles of HCl need to be added to 150.0 mL of 0.50 M NaZ to have a solution with a pH of 6.50? (Ka of HZ is 2.3 × 10–5)? Assume negligible volume of the HCl.

◦ 6.8 × 10–3
◦ 7.5 × 10–2
◦ 5.0 × 10–1
◦ 1.0 × 10–3
◦ None of these are correct.
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Marked as best answer by abern on Mar 21, 2021

yifu223

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Reply #1 on: Mar 21, 2021
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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abern

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Reply 2 on: Mar 21, 2021
Excellent

elyse44

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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