Chemistry Homework Help

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22 solutions

Polyprotic Acid

Q. Calculate the pH for a 0.100 M Na2CO3 solution with a Kb1 of 2.1 x 10-4 and a Kb2 of 2.2 x 10-8

Solved • Mar 25, 2020

Polyprotic Acid

Q. Using chemical equations, show how the triprotic acid H3PO4 ionizes in water. Phases are optional. Ka1: Ka2: ka#:

Solved • Mar 7, 2020

Polyprotic Acid

Q. A solution contains 45.5 mmol of H3PO4. What volume of 0.725 M NaOH must be added to reach the third equivalence point of the titration of the H3PO4 with NaOH? Answer: 1.88E2

Solved • Mar 4, 2020

Polyprotic Acid

Q. 1. Calculate the pH and [C6H5O73-] of a 0.125 M solution of the citric acid (H3C6H5O7), a triprotic acid (Ka1 = 7.4 X 10-4, Ka2 = 1.7 X 10-5 , Ka3 = 4.0 X 10-7) )?

Solved • Mar 3, 2020

Polyprotic Acid

Q. Based on their compositions and structures and on conjugate acid-base relationships, select the stronger base in each of the following pairs. HPO4^2- or H2PO4^-. a) HPO4^2- b) H2PO4^-

Solved • Feb 24, 2020

Polyprotic Acid

Q. Write the equilibrium equation associated with Ka3 for H3PO4? Express your answer as a chemical equation. Identify all of the phases in your answer.

Solved • Feb 23, 2020

Polyprotic Acid

Q. What is the equilibrium concentration of HPO42- in a 0.380 M solution of H3PO^4(aq)? (Ka1 = 7.5x10^-3, Ka2 = 6.2x10^-8, Ka3 = 4.8x10^-13

Solved • Oct 21, 2019