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[" One lilre of "1M" solution of an acid "(K_(a)=10^(-4)" at "25^(@)C)" has "pH=2." It is diluted by "],[" water so the new pH becomes double.The solution was diluted to y "x10^(2)ml" .The "],[" value of "(y+z)/(2)" is: "]

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One litre of 1 M solution of an acid HA(K_(a)=10^(-4)" at "25^(@)C) has pH = 2. It is diluted by water so the new pH becomes double. The solution was diluted to yxx10^(z)ml . The value of (y+z)/(2) is :

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