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Are Marks lost for not cancelling out electrons/protons in ion-electron equations? Watch

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    Take this reaction for example.

    2Mno4- + 16H+ + 5H2SO3 + 5H2O --> 2Mn2+ 8H20 + 20H+ + 5SO42-

    Okay, the reaction is balanced and I've cancelled out the electrons, but I haven't cancelled out the H20 molecules and the protons. For a 1 mark question, would I lose the 1 mark?
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    Check the mark scheme, but I think that would (and definitely should) be a lost mark.
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    It would lose the mark on OCR A papers.
 
 
 
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