Error in AQA A-Level Chemistry CGP revision guide Watch

Badges: 7
Report Thread starter 3 months ago
I think I’ve found an error in a math calculation in the AQA A-Level Chemistry CGP guide... can someone check it - I can’t post a pic so I’ll type the whole question in, alternatively it is page 127 topic transition metals titrations with transition metals.

Example: 27.5cm3 of 0.0200 mol dm-3 aqueous potassium manganate(VII) reacted with 25.0cm3 if acidified sodium ethanedioate solution. Calculate the concentration of C2O4- ions in the solution.

2MnO4- + 16H+ + 5C2O4- —> 2Mn^2+ + 8H2O + 10CO2

So above is the question, and then the working out is shown in the question, but at the end the answer is shown to be 0.552mol dm-3 but in my own working out I got 0.0552 and even when I typed in the working out from the actual page into my calculator I got 0.0552 - not 0.552. Can someone good at math check this for me and get back to me, please. Would be very appreciated. Thank you!
TSR Jessica
Badges: 19
Report 3 months ago
Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

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