Which solution has the highest concentration of $H_{3} O^{+}$ ions?

0.020 m o l a r K O H

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0.020 m o l a r H N O_{3}

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0.020 m o l a r C_{6} H_{12} O_{6}

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0.020 m o l a r M g (O H)_{2}

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Solution

The correct option is B $0.020 m o l a r H N O_{3}$
From the given options an acid will have highest concentration of $H_{3} O^{+}$ ions.
Hence, $0.02$ $M$ $H N O_{3}$ will give highest concentration of $H_{3} O^{+}$ ions since it is an acid.
The other options contain base $(K O H, M g (O H)_{2})$ and an organic species $(C_{6} H_{1} 2 O_{6})$ , which will have low $H_{3} O^{+}$ ion concentration.

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