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3 October, 18:04

Does the number of ions in solution increase, decrease, or remain constant?

It continuously decreases.

It continuously increases.

It decreases at first, then increases.

It increases at first, then decreases.

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  1. 3 October, 21:19
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    The correct option is "C." It decreases at first, then increases.

    Explanation:

    Considering the example below, which wish to prove what happens to the ions when they react in solutions:

    The question is, How does this evidence indicate that the reaction has occurred between ions?

    By adding H2SO4 to Ba (OH) 2 you are producing BaSO4, a mostly insoluble compound. As you increase the volume, and thereby the concentration of SO4-2 ions, you will see a precipitate form. This means that the [Ba+2] will decrease, the [H+] will increase with each addition of H2SO4, the [OH-] will react with the [H+] making H2O the same and the [SO4-2] will decrease because it reacts with the [Ba+2]. The more precipitate formed, the fewer Ba+2 and SO4-2 ions will be in solution and the fewer [H+] and [OH-] until the current is near 0 mA, then you will have excess of SO4-2 and H + the number of ions increase again increasing the conductivity
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