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[" (a) "20mL" of "0.1M" H.SO,is added to "30mL" of "0.2M" NH.OH solution.The pH of "],[" resutant mixture in had te "471],[[" (c) "5.2," (D) "9.9]],[[" (c) "5.0," (D) "94," (D) "94]]

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