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    In an example I was reading after electrolysis a solution of sodium hydroxide if left behind, I understand as one hydrogen ion is used in electrolysis, but it says it is OH-, how come when Hydrogen is positive and oxygen is negative. Surely it should just be OH as the ions cancel each other out? Here's the page for further reference: http://www.bbc.co.uk/schools/gcsebit...ysisrev5.shtml
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    hydrogen (group 1 on the periodic table) has a positive charge of 1 oxygen (group 6 on the periodic table) has a negative charge of 2-in an OH- covalent bond, 2 electrons are shared between hydrogen and oxygen. the hydrogen has a full shell of 2 electrons, while the oxygen only has 7 electrons in its outer shell. the charge of H is at 0, and the charge of O is at 1-. this means that the combination has a charge of 1-.while the overall charge is 0 in a H2O molecule, it is -1 in an OH- molecule.
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    (Original post by euphrosynay)
    hydrogen (group 1 on the periodic table) has a positive charge of 1 oxygen (group 6 on the periodic table) has a negative charge of 2-in an OH- covalent bond, 2 electrons are shared between hydrogen and oxygen. the hydrogen has a full shell of 2 electrons, while the oxygen only has 7 electrons in its outer shell. the charge of H is at 0, and the charge of O is at 1-. this means that the combination has a charge of 1-.while the overall charge is 0 in a H2O molecule, it is -1 in an OH- molecule.
    Thankyou so much!
 
 
 

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