Subject:Chemistry
Which of the following are strong electrolytes? [Select all that apply.]
Group of answer choices
NaOH
NaBr
CaCl2
Benzene (C6H6)
CH3NH3
HF
HClO3
HCl
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Answer
Strong electrolytes are substances that completely dissociate into ions when dissolved in water. They conduct electricity very well due to the presence of free-moving ions.
The strong electrolytes from your list are:
- NaOH (Sodium hydroxide)
- NaBr (Sodium bromide)
- CaCl2 (Calcium chloride)
- HClO3 (Chloric acid)
- HCl (Hydrochloric acid)
Here's why:
- NaOH, NaBr, and CaCl2 are salts and they completely dissociate into their ions in water.
- HClO3 and HCl are strong acids, which also dissociate completely in water.
On the other hand, Benzene (C6H6), CH3NH3 (Methylamine), and HF (Hydrofluoric acid) are not strong electrolytes.
- Benzene (C6H6) is a nonpolar molecule and does not ionize in water.
- CH3NH3 is a weak base and does not completely dissociate in water.
- HF is a weak acid and does not completely dissociate in water.
Here's a table summarizing the information:
| Substance | Strong Electrolyte? |
|---|---|
| NaOH | Yes |
| NaBr | Yes |
| CaCl2 | Yes |
| Benzene (C6H6) | No |
| CH3NH3 | No |
| HF | No |
| HClO3 | Yes |
| HCl | Yes |