Questions: Which of the compounds H2C2O4, Ca(OH)2, KOH, and HI, behave as bases when they are dissolved in water? A) Ca(OH)2 and KOH B) H2C2O4 and HI C) only HI D) only KOH

Which of the compounds H2C2O4, Ca(OH)2, KOH, and HI, behave as bases when they are dissolved in water? A) Ca(OH)2 and KOH B) H2C2O4 and HI C) only HI D) only KOH
Transcript text: D) only KOH 12) Which of the compounds $\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}, \mathrm{Ca}(\mathrm{OH})_{2}, \mathrm{KOH}$, and HI , behave as bases when they are dissolved in water? A) $\mathrm{Ca}(\mathrm{OH})_{2}$ and KOH B) $\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}$ and HI C) only HI D) only KOH
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Solution

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Solution Steps

Step 1: Identify the Nature of Each Compound

To determine which compounds behave as bases when dissolved in water, we need to identify their chemical nature:

  • $\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}$ (oxalic acid) is an acid.
  • $\mathrm{Ca}(\mathrm{OH})_{2}$ (calcium hydroxide) is a base.
  • $\mathrm{KOH}$ (potassium hydroxide) is a base.
  • HI (hydroiodic acid) is an acid.
Step 2: Determine Which Compounds are Bases

From the identification:

  • $\mathrm{Ca}(\mathrm{OH})_{2}$ and $\mathrm{KOH}$ are bases.
  • $\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}$ and HI are acids.
Step 3: Match the Correct Answer

The compounds that behave as bases when dissolved in water are $\mathrm{Ca}(\mathrm{OH})_{2}$ and $\mathrm{KOH}$.

Final Answer

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