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Need help with one task- volume of gasses produced during electrolysis
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Topic: Need help with one task- volume of gasses produced during electrolysis (Read 2027 times)
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Johulus
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Need help with one task- volume of gasses produced during electrolysis
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on:
January 04, 2015, 01:28:18 PM »
After electrolysis of sodium nitrate aqueous solution the mass fraction of sodium nitrate was 60%. The mass fraction of sodium nitrate before electrolysis was 40%. What is the overall volume of gasses produced during the electrolysis at temperature of 20°C and pressure of 99.8 kPa?
I don't know how to start. I'm lost. Everything would be fine if I had masses but I don't know what should I do with just fractions.
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Borek
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Re: Need help with one task- volume of gasses produced during electrolysis
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Reply #1 on:
January 04, 2015, 04:07:49 PM »
Not enough data to solve. The only thing you can do is to report the answer as "x L per 1000 g of the initial solution".
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ChemBuddy
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Johulus
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Re: Need help with one task- volume of gasses produced during electrolysis
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Reply #2 on:
January 04, 2015, 04:20:28 PM »
Thanks! That's what I thought but I was so confused. It's all info that was provided in the task. Weird.
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Hunter2
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Re: Need help with one task- volume of gasses produced during electrolysis
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Reply #3 on:
January 04, 2015, 09:13:51 PM »
Additional you can calculate the Percentage of the water what was electrolysied. Its 33,3...%.
With an given start volumen or start mass its possible. to calculate the rest.
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Johulus
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Re: Need help with one task- volume of gasses produced during electrolysis
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Reply #4 on:
January 05, 2015, 06:22:31 AM »
Actually I have a result also and it should be 169.2. It seems they calculated the volumes of gasses for 100g of sodium nitrate. Thank you on your answers.
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Need help with one task- volume of gasses produced during electrolysis