What is the difference between buffers with high and low ca-pacities? Will adding 0.01 mol of HCl produce a greater pHchange in a buffer with a high or a low capacity? Explain.
What is the difference between buffers with high and low ca-pacities? Will adding 0.01 mol of HCl produce a greater pHchange in a buffer with a high or a low capacity? Explain.
A buffer with high capacity can resist the change in pH of the solution by the addition of concentration of acid and base to larger extent.
A buffer with low capacity can resist the change in pH of the solution by the addition of concentration of acid or base to smaller extent.
Buffer capacity can be determined from the absolute and relative concentrations of the components present in it. In terms of absolute concentration, the buffer capacity is more if the concentrations of the acid and its conjugate base present in the buffer are high and it is less if the concentrations are low. In terms of relative concentrations, the buffer capacity is high if the concentrations of the acid and its conjugate base are equal. It decreases as the difference in concentrations of these two species increases. Hence, the addition of 0.01 mol of HCl produce a greater change in buffer with low capacity.
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