Polyions

• formula of hydroxide ions 


  $OH^-$
• formula for nitrate ions 


  NO3-
• formula for ammonium 


  $NH4^+$
• formula for sulphate ions 


  $SO4^2$$^-$
• formula for carbonate ions 


  $CO3^2$$^-$
• phosphate ions 


  $PO4^-$$^2$
• ammonium 


  $NH4^+$
• formula of hyrdogen sulphate 


  $HSO4^-$
• hydrogen carbonate 


  $HCO3^-$
• copper ions 


  $Cu^2$$^+$