A Buffer Is Prepared by Adding 150 ML of 1

question 29

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?

• 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

---

Definitions:

Appetite Suppressant

A substance that reduces a person's desire to eat.

Ethical Standards

Principles and values that guide behavior and decision-making, ensuring integrity and fairness.

Deceptive Claims

False or misleading statements made to manipulate or deceive others, often found in advertising or misinformation.

Scientific Evidence

Data or facts that serve to either support or counter a scientific theory or hypothesis, obtained through systematic observation, experimentation, or research.