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1 September, 16:56

Which substance yields hydroxide ion as the only negative ion in aqueous solution?

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  1. 1 September, 19:26
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    Missing question:

    a. Mg (OH) 2.

    b. CH3Cl.

    c. MgCl2.

    d. C2H4 (OH) 2.

    Answer is: a. Mg (OH) ₂.

    An Arrhenius base is a substance that dissociates in water to form hydroxide ions (OH⁻).

    In this example magnesium hydroxide is an Arrhenius base:

    Mg (OH) ₂ (aq) → Ba²⁺ (aq) + 2OH⁻ (aq).

    CH₃Cl and C₂H₄ (OH) ₂ are organic compound and will not give hydroxide ions in water, MgCl₂ is neutral salt and it will give Cl⁻ ions.
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