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Arrhenius Acid

At 900 K, p...

Question

At 900 K, ${p K}_{w}$ is 13. At this temperature an aqueous solution with $p H = 7$ will be:

A

acid

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B

basic

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C

natural

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D

none of these

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Solution

The correct option is B basic
When $p K_{w}$ =13, its neutral $p H$ is 6.5. When the $p H$ is greater than 6.5, it is basic and less than 6.5, it is acidic. So, when $p H$ =7, it is basic.

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