For each of the following solutions, calculate the initial pH and the final pH after adding...

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For each of the following solutions, calculate the initial pH and the final pH after adding...

For each of the following solutions, calculate the initial pH and the final pH after adding 0.0200 mol of NaOH .

Part A

For 270.0 mL of pure water, calculate the initial pH and the final pH after adding 0.0200 mol of NaOH .

Express your answers using two decimal places separated by a comma.

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Part B

For 270.0 mL of a buffer solution that is 0.230 M in HCHO2 and 0.280 M in KCHO2 , calculate the initial pH and the final pH after adding 0.0200 mol of NaOH(Ka=1.8⋅10−4) .

Express your answers using two decimal places separated by a comma.

pHinitial , pHfinal =

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Part C

For 270.0 mL of a buffer solution that is 0.2763 M in CH3CH2NH2 and 0.2518 M in CH3CH2NH3Cl , calculate the initial pH and the final pH after adding 0.0200 mol of NaOH(Kb=5.6⋅10−4) .

Express your answers using two decimal places separated by a comma.

pHinitial , pHfinal =

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pHinitial , pHfinal =

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Answer 1

Answer #1

o.270 1-13 log | ?.01SC H=4.jo

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Answer 2

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