Consider the Titration of 200

question 159

Multiple Choice

Consider the titration of 200.0 mL of a 0.100 M solution of the weak acid H₂A with 0.200 M NaOH. The first equivalence point is reached after 100.0 mL of 0.200 M NaOH has been added, and the pH is 6.27. The pH after 65.0 mL of 0.200 M NaOH has been added, the pH is 4.95.Calculate the pH of the original acid (no NaOH added) .

• A) 3.19
• B) 2.84
• C) 2.55
• D) 4.68
• E) none of these

---

Definitions:

Different Times

Various points or periods in time, indicating a range of temporal instances or durations.

Marginal Utility

The heightened utility one obtains from the consumption of an extra unit of a particular good or service.

Income

Income earned, particularly when it's consistent, from work or investment returns.

Efficient Allocation

An economic condition where resources are distributed in a way that maximizes the welfare of society, ensuring that every good or service is produced up to the point where the last unit provides a benefit equal to the cost of producing it.