Question: Does the following statement describe a chemical or a physical change? If we pass electrical current through salt water, hydrogen and oxygen gas form from

  1. Does the following statement describe a chemical or a physical change?

    If we pass electrical current through salt water, hydrogen and oxygen gas form from the water.

    Also, which substance (or mixture of substances) undergoes this change? Please select all the correct answers.

    The statement describes a physical change of gas formation.

    The statement describes a chemical change of gas formation.

    The substance changed in the statement is salt water.

    The substances changed in the statement are oxygen and hydrogen.

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