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Author Question: 15.0 mL of 0.50 M NaOH is added to a 100.-mL sample of 0.379 M NH3 (Kb for NH3 = 1.8 105). What is ... (Read 196 times)

dejastew

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on: Mar 21, 2021

Question 1

15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.478 M HNO2 (Ka for HNO2 = 4.0 × 10–4). What is the equilibrium concentration of NO2– ions?

◦ 2.5 × 10–3M
◦ 1.7 × 10–4M
◦ 4.2 × 10–1M
◦ 5.0 × 10–2M
◦ None of these are correct.

Question 2

15.0 mL of 0.50 M NaOH is added to a 100.-mL sample of 0.379 M NH3 (Kb for NH3 = 1.8 × 10–5). What is the equilibrium concentration of NH4+ ions?

◦ 9.5 × 10–3M
◦ 5.9 × 10–6M
◦ 3.3 × 10–1M
◦ 9.1 × 10–5M
◦ None of these are correct.
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Marked as best answer by dejastew on Mar 21, 2021

Carliemb17

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Reply #1 on: Mar 21, 2021
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dejastew

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Reply 2 on: Mar 21, 2021
Wow, this really help

Dinolord

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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