What Is the Hydroxide-Ion Concentration of a 0 $\times$ 10^-2 and K_a2 = 5

question 50

Multiple Choice

What is the hydroxide-ion concentration of a 0.250 M sodium oxalate (Na₂C₂O₄) solution? For oxalic acid (H₂C₂O₄) ,K_a1 = 5.6 $\times$ 10^-2 and K_a2 = 5.1 $\times$ 10^-5.(K_w = 1.01 $\times$ 10^-14)

• A) 7.0 \(\times\) 10^-6 M
• B) 1.0 \(\times\) 10^-7 M
• C) 9.4 \(\times\) 10^-2 M
• D) 3.5 \(\times\) 10^-3 M
• E) 2.1 \(\times\) 10^-7 M

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Definitions:

Anastasis

Greek, “resurrection.” In Byzantine art, the representation of Christ’s descent into limbo.

Byzantine-Era Church

A Christian church from the Byzantine Empire era, characterized by extensive use of domes, mosaics, and an Eastern Christian liturgical structure.

Apse

A recess, usually semicircular, in the wall of a building, commonly found at the east end of a church.

Monastery of Saint Catherine

An ancient monastery located at the foot of Mount Sinai in Egypt, it is one of the oldest working Christian monasteries in the world with a rich collection of art.