Solved

A Solution Is Prepared by Dissolving 20

Question 94

Multiple Choice

A solution is prepared by dissolving 20.0 g of K2HPO4 and 25.0 g of KH2PO4 in enough water to produce 1.0 L of solution. What is the pH of this buffer? For phosphoric acid (H3PO4) , Ka2 = 6.2 × 10−8.


A) 7.70
B) 7.42
C) 7.21
D) 7.00
E) 6.72

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q89: What is the pK<sub>a</sub> for the acid

Q90: Which one of the following is the

Q91: Calculate the molar solubility of silver carbonate

Q92: A diprotic acid H<sub>2</sub>A has K<sub>a1</sub> =

Q93: Which of the following substances has the

Q95: Use the following information to calculate the

Q96: The solubility of calcium chromate is 1.56

Q97: What is the [H<sub>3</sub>O<sup>+</sup>] in a solution

Q98: A 25.0-mL sample of 0.35 M HCOOH

Q99: Barium sulfate (BaSO<sub>4</sub>) is a slightly soluble