Exhibit 15-4 Consider Dissolving NaF in Water as Shown in the Equation

question 111

Multiple Choice

Exhibit 15-4 Consider dissolving NaF in water as shown in the equation below to answer the following question(s) :
NaF (s) + H₂ O ( ) HF (aq) + NaOH (aq)
-Refer to Exhibit 15-4. What is the base ionization constant , K b , for this reaction?
K a (HF) = 6.8 10 - 4

• A) K _b = - 6.8×10 ^{- 4}
• B) K _b = 6.8×10 ^{- 18}
• C) K _b = 1.47×10 ^{- 11}
• D) K _b = 1.47×10 ^{- 4}
• E) K _b = 6.8×10¹⁰

Understand the classification of structural steel shapes by their designated letter codes.

Identify and interpret thread notes in structural design documents.

Understand basic welding symbols and their placements on technical drawings.

Differentiate between weld symbols and welding symbols.

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