Which of the following is not true: A buffer is a solution that resists changes

Question

Which of the following is not true: A buffer is a solution that resists changes in pH by neutralizing small amounts of acids or bases buffered solutions are composed of a strong acid and its conjugate base buffered solutions are composed of a weak base and its conjugate acid A buffered system exists in equilibrium Adding acid to a buffer will cause the solution pH to decrease only slightly II only IV only II, IV & V II and III Excel graphs can be adjusted to account for the best straight line and error. True False

Explanation / Answer

Buffer solution is formed between Strong Base and its conjugate acid or Strong Acid and its conjugate base. So II is correct.

As said above Strong acid or base dissociates in the solution to give its conjugate base or acid respectively. So its exists in equlibrium. So IV is correct.

Buffer name only means that Small change in concentration does not change the pH drastically due to buffer action. Hence V is correct.

Hence Ans: C

Excel can employ linear regression to minimize the error and plot the best fit straight line for the give data points. Hence the statement is True.

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