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Author Question: If an aqueous solution is prepared by dissolving 1.6 mol Na2CrO4 in 1.0 L of a buffer at pH 8.24, ... (Read 161 times)

jman1234

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Question 1

How much carbon monoxide is required to reduce 2.00 metric tons (2000 kg) of iron ore if the ore is 5.03% iron?

Fe2O3(s) + 3 CO(g) → 2 Fe(l) + 3 CO2(g)

◦ 151 kg
◦ 75.7 kg
◦ 25.2 kg
◦ 40.7 kg
◦ 50.5 kg

Question 2

If an aqueous solution is prepared by dissolving 1.6 mol Na2CrO4 in 1.0 L of a buffer at pH 8.24, what will be [Cr2O72-] in the solution? The resultant equilibria are:

HCrO4-(aq) H+(aq) + CrO42-(aq)  Ka = 3.2 × 10-7
2 HCrO4-(aq) Cr2O72-(aq)+ H2O(l) K = 33

◦ 9.9 × 10-5 M
◦ 2.9 × 10-28 M
◦ 8.9 × 10-9 M
◦ 8.6 × 102 M
◦ 2.8 × 10-2 M


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Marked as best answer by jman1234 on Jul 8, 2021

Joc

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jman1234

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Reply 2 on: Jul 8, 2021
Wow, this really help


coreycathey

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Reply 3 on: Yesterday
Excellent

 

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