You are Here: Home

# What does H202 - 2 Vol mean? watch

1. What does H202 - 2 Vol mean? Please help, I know its a concetration, and if it is can you please tell me what it is in mol dm-3? ( need answe quickly for coursework

Thanks
Truez
3. Thanks for the quick reply EierVonSatan...But I wanted to know how to convert 2 Vol into mol dm-3. I appreciate the link and effort though

Thanks
Truez
4. The link explains how to do that
5. "If your hydrogen peroxide solution is 100 vol (quite reasonable for a strong stock solution) this means that 1000 cm3 of the H2O2 produces 100,000 cm3 of oxygen.

100 dm3 of oxygen = 100/24 moles = 4.17 moles

If 4.17 moles of oxygen are produced then there must have been 4.17 x 2 moles of hydrogen peroxide = 8.34 moles in 1 dm3 = 8.34 molar.

so if 100 vol is 8.34 molar then 1 vol = 0.0834 molar etc."

Ohhh I get it, 2 vol is 0.0834 molar x 2 which is = 0.1668 molar! Can you just check Ive done it right, because to be honest im hopeless with calculations, and 1 more thing does 0.1668 molar mean 0.1668 mol dm-3? Thanks for all your help
Truez
6. (Original post by Truez)
"If your hydrogen peroxide solution is 100 vol (quite reasonable for a strong stock solution) this means that 1000 cm3 of the H2O2 produces 100,000 cm3 of oxygen.

100 dm3 of oxygen = 100/24 moles = 4.17 moles

If 4.17 moles of oxygen are produced then there must have been 4.17 x 2 moles of hydrogen peroxide = 8.34 moles in 1 dm3 = 8.34 molar.

so if 100 vol is 8.34 molar then 1 vol = 0.0834 molar etc."

Ohhh I get it, 2 vol is 0.0834 molar x 2 which is = 0.1668 molar! Can you just check Ive done it right, because to be honest im hopeless with calculations, and 1 more thing does 0.1668 molar mean 0.1668 mol dm-3? Thanks for all your help
Truez
Yes, done correct

and yes molar means mol dm-3
7. Ohhh thankyou soo much guyss!!

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 27, 2010
Today on TSR

### Are you living on a tight budget at uni?

From budgets to cutbacks...

### University open days

1. Loughborough University
Fri, 21 Sep '18
2. University of Cambridge
Fri, 21 Sep '18
3. Richmond, The American International University in London