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# Some redox titration questions need help please watch

1. I have done these quesitons but I don't have the mark scheme for it. Will appreciate if someone can tell me whether I am right or not.

Q4 : 2cm^3 needed
Q5 : 24.7%
Q6 : 93.7%

Attachment 616524616526

Thanks
Attached Images

2. Q4 is deffo not 2.

But I'm too busy to check t'others.
3. (Original post by coconut64)
I have done these quesitons but I don't have the mark scheme for it. Will appreciate if someone can tell me whether I am right or not.

Q4 : 2cm^3 needed
Q5 : 24.7%
Q6 : 93.7%

Attachment 616524616526

Thanks
Q5 is correct
4. (Original post by coconut64)
I have done these quesitons but I don't have the mark scheme for it. Will appreciate if someone can tell me whether I am right or not.

Q4 : 2cm^3 needed
Q5 : 24.7%
Q6 : 93.7%

Attachment 616524616526

Thanks
Q6 is correct ( I got 94.1, but I used 56 as the Ar of iron.
5. (Original post by Pigster)
Q4 is deffo not 2.

But I'm too busy to check t'others.
what went wrong ? Thanks
6. (Original post by coconut64)
what went wrong ? Thanks
Why did you multiply by 100 in the last step?
7. (Original post by Pigster)
Why did you multiply by 100 in the last step?
Because you want it in cm^3 not dm^3 surely ?
8. (Original post by coconut64)
Because you want it in cm^3 not dm^3 surely ?
how many cm3 in a dm3 ?
9. (Original post by charco)
how many cm3 in a dm3 ?
So the right answer would be 20 ? Thanks

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