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Q4. (a) Calculate the pH of the following solution: 2.8 x 10-4 M Ba(OH)2 (b) What is the original molarity of a solution of HF

Q4. (a) Calculate the pH of the following solution: 2.8 x 10-4 M Ba(OH)2 (b) What is the original molarity of a solution of HF whose pH is 1.7 at equilibrium? (Ka = 6.6 x 10-) HF (aq) = H+ (aq) +F- (aq)

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