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Buffer

Q. Please answer step by step Which of the following the ratio of the conjugate base concentration over the weak acid concentration represents the highest pH limit for an effective buffer.

Solved • Mar 27, 2019

Buffer

Q. Buffer with a pH of 4.38 contains 0.21 M of sodium benzoate and 0.14 M of benzoic acid. What is the concentration of H+ in the solution after the addition of 0.050 mol of HCl to final volume of 1.4 L?

Solved • Mar 27, 2019

Buffer

Q. A 1.50 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 0.100 moles of solid NaOH.

Solved • Mar 27, 2019

Buffer

Q. A buffer is prepared by mixing 204mL of 0.452 M HCl and 0.500 L of 0.400 M sodium acetate. What is the pH? How many grams of KOH must be added to 0.500 L of the buffer to change the pH by 0.15 units?

Solved • Mar 26, 2019

Buffer

Q. Buffer has 0.22 M KHCO3, 0.37 M K 2 CO3 Carbonic acid is a diprotic acid with K a1 = 4.5×10 −7 and K a2 = 4.7×10 −11 . (a) Which K a value is more important to this buffer? (b) What is the buffer pH

Solved • Mar 26, 2019

Buffer

Q. What is the pH of 40.0 mL of a solution that is 0.19 M in CN– and 0.21 M in HCN? For HCN, use Ka = 4.9 × 10–9.

Solved • Mar 26, 2019

Buffer

Q. calculate the mass (in grams) of solid NaCH3CO2*3H2O needed to make 150 mL of buffer solution (pH=4.8) when 10.0 mL of 3.0 M CH3COOH are used

Solved • Mar 26, 2019