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Which of the following statements is/are True about a strong electrolyte?

I. It partially dissociates while dissolving into water.
II. NaCl is a strong electrolyte in water.
III. A substance can be both a strong electrolyte and nonelectrolyte in water.
Oboth II and III
both I and II
I only
none of them
Il only

1 Answer

2 votes

Answer: Choice II only. It is true that NaCl is a strong electrolyte in water.

Step-by-step explanation:

II. True: NaCl is a strong electrolyte in water.

- NaCl is made from hydrochloric acid (HCl) and sodium hydroxide (NaOH). NaOH is a strong electrolyte and HCl is a strong acid that completely dissociates in water. Acids neutralize bases to produce salts (NaCl) and water (H2O). Strong bases are good electrolytes because they completely ionize in water. NaCl is a strong electrolyte as it splits into sodium and chloride ions in an aqueous solution. Ex. Salt water contains sodium chloride dissolved in water. Salts are often strong electrolytes.

I. False: It partially dissociates while dissolving into water.

- A *strong* electrolyte would completely dissociate while dissolving into water, NOT partially. *Weak* electrolytes only dissociate partially. Strong electrolytes exist as ions in an aqueous solution like water (completely dissociate) and the weak electrolytes exist only partly as ions in a solution (just partially dissociates).

III. False: A substance can be both a strong electrolyte and nonelectrolyte in water.

- Nonelectrolytes produce NO ions in solution. A substance cannot be both a strong electrolyte and non electrolyte in water. Nonelectrolytes do not conduct electricity in aqueous solutions. They do not dissociate even partly.

User Marcos Griselli
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