What is produced at each electrode in the electrolysis of an aqueous solution of both and

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Redox Reaction Video Lessons. Problem : What is produced at each electrode in the electrolysis of an aqueous solution of both NaBr and AgF? Drag the appropriate items to their respective bins. Learn this topic by watching Redox Reaction Concept Videos.

See all problems in Redox Reaction. However, the electrolysis of sodium chloride solution produces hydrogen. If the negative ion from the ionic compound is simple eg Cl - or Br - , then that element is produced. If the negative ion is a complex ion eg NO 3 - , SO 4 2 - , CO 3 2 - , then oxygen is produced from the hydroxide ion present instead.

The table summarises some of the elements you should expect to get during electrolysis. This table shows some common ionic compounds in solution , and the elements released when their solutions are electrolysed using inert electrodes, eg carbon electrodes:.

If a halide solution is very dilute eg NaCl , then oxygen will be given off instead of the halogen. This is because the halide ions are outnumbered by the hydroxide ions from the water. At the negative electrode Metal ions and hydrogen ions are positively charged. Whether you get the metal or hydrogen during electrolysis depends on the position of the metal in the reactivity series : the metal will be produced if it is less reactive than hydrogen hydrogen will be produced if the metal is more reactive than hydrogen The reactivity series of metal - carbon and hydrogen are not metals, but they are shown for comparison So, for example, the electrolysis of copper chloride solution produces copper at the negative electrode.

Whether hydrogen or a metal is produced at the cathode depends on the position of the metal in the metal reactivity series :. Predict the product formed at the negative electrode during the electrolysis of sodium chloride solution.

Hydrogen will be produced because sodium is more reactive than hydrogen. Predict the product formed at the negative electrode during the electrolysis of copper chloride solution. Copper will be produced because copper is less reactive than hydrogen. Oxygen is produced from hydroxide ions , unless halide ions chloride, bromide or iodide ions are present. In that case, the negatively charged halide ions lose electrons and form the corresponding halogen chlorine, bromine or iodine.

The table summarises the product formed at the anode during the electrolysis of different electrolytes in solution. Predict the product formed at the positive electrode during the electrolysis of concentrated sodium sulfate solution.