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What is the pH of a solution made by mixing 25 mL of .050 M HNO3...

What is the pH of a solution made by mixing 25 mL of .050 M HNO3 into a final volume of 2.0 Liters of water?

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Expert Solution

Intial                              Final

M1 = 0.05M                M2 =

V1 = 25ml                   V2 = 25+2000 =2025ml

      M1V1 = M2V2

      M2    = M1V1/V2   = 0.05*25/2025 = 0.000617M

HNO3 -------------> H^+ + NO3^-

0.000617M             0.000617M

   [H^+]   = [HNO3]

   [H+] = 0.000617M

   PH = -log[H+]

           = -log0.000617   = 3.2097 >>>>>answer

queen_honey_blossom answered 2 years ago
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