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Some redox titration questions need help please Watch

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    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%

    Name:  1486071182676-1063818746.jpg
Views: 29
Size:  531.2 KBAttachment 616524616526

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    Q4 is deffo not 2.

    But I'm too busy to check t'others.
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    (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%

    Name:  1486071182676-1063818746.jpg
Views: 29
Size:  531.2 KBAttachment 616524616526

    Thanks
    Q5 is correct
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    (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%

    Name:  1486071182676-1063818746.jpg
Views: 29
Size:  531.2 KBAttachment 616524616526

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

    But I'm too busy to check t'others.
    Name:  14860777566792028063192.jpg
Views: 24
Size:  306.1 KB what went wrong ? Thanks
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    (Original post by coconut64)
    what went wrong ? Thanks
    Why did you multiply by 100 in the last step?
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    (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 ?
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    (Original post by coconut64)
    Because you want it in cm^3 not dm^3 surely ?
    how many cm3 in a dm3 ?
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    (Original post by charco)
    how many cm3 in a dm3 ?
    So the right answer would be 20 ? Thanks
 
 
 
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