Find the pH of a 0.170M HClO2(aq) solution. For HClO2, Ka=0.011.

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Chemistry

Find the pH of a 0.170M HClO2(aq) solution.For HClO2, Ka=0.011.

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For the given reaction -

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â HClO₂ (aq) + H₂O (l) <------------> H₃O⁺ (aq) + ClO₂^- (aq)

Â Â Â Â Â Â I(M)Â Â Â Â Â Â Â Â Â Â 0.170Â Â Â Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0

Â Â Â Â Â Â CÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â -xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â +xÂ Â Â Â Â Â Â Â Â Â Â Â +x

Â Â Â Â Â Â EqÂ Â Â Â Â Â Â Â Â Â Â (0.170-x)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â x

Therefore -

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â K_a = 0.011 = (x)(x) / (0.170-x)

By solving the above equation - x = 0.038 M

Hence - x = [H₃O⁺] = 0.038 M

Therefore - pH = - log [H₃O⁺] = - log(0.038) = 1.41

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Find the pH of a 0.170M HClO2(aq) solution. For HClO2, Ka=0.011.

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Chemistry

Find the pH of a 0.170M HClO2(aq) solution.For HClO2, Ka=0.011.

Answer & Explanation Solved by verified expert

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