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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Ionic Equilibrium

NTA Abhyas 2020 · Chemistry · Ionic Equilibrium

A 50mL solution of pH=1 is mixed with a 50mL solution of pH=2 . The...

A 50mL\text{50}\text{mL} solution of pH=1\text{pH}\text{=}\text{1} is mixed with a 50mL\text{50}\text{mL} solution of pH=2\text{pH}\text{=}\text{2}. The pH\text{pH} of the mixture isA 50mL solution of pH=1 is mixed with a 50mL solution of pH=2 . The pH of the mixture is

Options

  1. A0.86
  2. B1.26
  3. C1.76
  4. D2.26

Correct answer

B. 1.26

Step-by-step solution

A 50mL solution of pH=1 is mixed with a 50mL solution of pH=2 . The pH of the mixture is

Vf=100ml{V}_{f} = 100ml

Cf=10−1×50+10−2×50100=0.055M{C}_{f} = \dfrac{1{0}^{- 1} \times 50 + 1{0}^{- 2} \times 50}{100} = 0.055M

pH=−log⁡(0.055)=1.26pH = - \log \left(0.055\right) = 1.26
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