Multiple Choice
Gallium is produced by the electrolysis of a solution containing which of the following compounds?
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6. Chemical Quantities & Aqueous Reactions
Electrolytes
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Which of the following represents a strong base?
A
Mg(OH)2
B
CH4
C
H2
D
CsH
E
CaOH
Verified step by step guidance1
Step 1: Understand the concept of a strong base. A strong base is a compound that completely dissociates in water to produce hydroxide ions (OH⁻). Common strong bases include alkali metal hydroxides like NaOH and KOH.
Step 2: Evaluate each compound given in the problem to determine if it can dissociate to produce hydroxide ions. Look for compounds that contain OH groups and are known to dissociate completely in water.
Step 3: Analyze Mg(OH)₂. Magnesium hydroxide is not a strong base because it does not completely dissociate in water; it is considered a weak base.
Step 4: Consider CH₄ and H₂. Methane (CH₄) and hydrogen gas (H₂) do not contain hydroxide ions and do not dissociate to produce OH⁻ ions, so they are not bases at all.
Step 5: Examine CsH and CaOH. CsH (cesium hydride) can react with water to produce hydroxide ions, making it a strong base. CaOH is not a valid chemical formula for calcium hydroxide, which is Ca(OH)₂, and it is a weak base.
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