5I.11 units

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5I.11 units

Postby Christineg1G » Wed Jan 15, 2020 9:47 am

For HW 5I.11 how would the concentration of SO2, O2, and SO3 be converted from nmol to mol. For example how is the concentration of SO2=1.20nmol converted to 1.20x10^-3 mol?

Nathan Nakaguchi 1G
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Re: 5I.11 units

Postby Nathan Nakaguchi 1G » Wed Jan 15, 2020 9:58 am

From my ebook it says 1.20 milli-mol SO2, I think you may have misread it or there was a typo.

Ally Huang- 1F
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Re: 5I.11 units

Postby Ally Huang- 1F » Wed Jan 15, 2020 9:58 am

The question gives the units in terms of mmol, which is millimole. There are 1000 millimoles in 1 mol, so 1.20mmol SO2 divided by 1000 gives 1.20x10^-3 mol.

Kayli Choy 2F
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Re: 5I.11 units

Postby Kayli Choy 2F » Wed Jan 15, 2020 10:29 am

Additionally, since this problem is asking for Q, you must then divide those mole values by the volume (.500 L), and then use those concentrations to calculate Q = [SO3]^2 / ( [O2] * [SO2]^2 ).

Daniel Chen 2L
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Re: 5I.11 units

Postby Daniel Chen 2L » Sat Jan 18, 2020 5:57 pm

Could you not just convert the mmol values to mol so you can calculate the concentrations that way?

Jessica Li 4F
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Re: 5I.11 units

Postby Jessica Li 4F » Sat Jan 18, 2020 7:36 pm

Yes, you could just calculate the mmol to moles (1 mol = 1000 mmol) and then divide that by the volume (0.500 L) to get the concentration.

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