Multiple Choice
Which of the following is closest to the minimum voltage required to power the electrolysis of molten sodium chloride (NaCl) under standard conditions?
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6. Chemical Quantities & Aqueous Reactions
Electrolytes
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Which of the following substances will form individual ions when dissolved in water?
A
NaCl
B
CO_2
C
CH_3OH
D
C_6H_{12}O_6
Verified step by step guidance1
Step 1: Understand the difference between ionic and molecular compounds. Ionic compounds, like NaCl, consist of positive and negative ions held together by ionic bonds, and they typically dissociate into individual ions when dissolved in water.
Step 2: Analyze each substance: NaCl is an ionic compound made of Na⁺ and Cl⁻ ions, so it will dissociate into these ions in water.
Step 3: CO₂ is a molecular compound (covalent), which dissolves in water but does not form ions; instead, it may react with water to form carbonic acid, but it does not produce free ions directly.
Step 4: CH₃OH (methanol) is a molecular compound that dissolves in water but remains as intact molecules; it does not ionize to form ions.
Step 5: C₆H₁₂O₆ (glucose) is also a molecular compound that dissolves as whole molecules without forming ions.
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