Cryolite Is a Compound Needed for the Hall-Heroult Process for Producing

question 44

Multiple Choice

Cryolite is a compound needed for the Hall-Heroult process for producing aluminum. Cryolite is produced by the following reaction: 6 HF + Al(OH) ₃ + 3 NaOH → Na₃AlF₆ + 6 H₂O
How many grams of cryolite are produced if the reaction has a 67.3% yield and a limiting reagent of 35.4 grams of NaOH?

• A) 61.9 g
• B) 41.7 g
• C) 125 g
• D) 186 g
• E) 20.2 g

Understand the straight-line method of depreciation.

Understand the units-of-production method of depreciation.

Understand the double-declining-balance method of depreciation.

Understand the sum-of-the-years-digits method of depreciation.

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