A Buffer Is Prepared by Adding 150 ML of 1

question 22

Multiple Choice

A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of 1.0 M NaH₂PO₄. How many moles of HCl must be added to this buffer solution to change the pH by 0.18 units? If necessary, assume the total volume remains unchanged at 400 mL.

• A)0.025 mol HCl
• B)0.063 mol HCl
• C)0.082 mol HCl
• D)0.50 mol HCl
• E)1.0 mol HCl

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Definitions:

Inventory Costing Method

A system used to value inventory, often involving methods such as First-In, First-Out (FIFO) or Last-In, First-Out (LIFO).

Step-fixed Costs

Costs that remain constant for a certain level of activity, but can change when a new activity level is reached.

Unit Costs

The cost incurred to produce, store, or purchase one unit of a product or service.

Production

The process of creating, manufacturing, or generating goods and services.