Chemistry Practice Problems Electrolytes Practice Problems Solution: Which of the following statements is true?A. All s...

Solution: Which of the following statements is true?A. All soluble ionic compounds are weak electrolytes.B. Weak electrolytes dissociate completely in water.C. Aqueous solution of sucrose is a strong electrolyte.D. Electrolyte solutions conduct heat.E. NH3 is a weak electrolyte.

Problem

Which of the following statements is true?

A. All soluble ionic compounds are weak electrolytes.

B. Weak electrolytes dissociate completely in water.

C. Aqueous solution of sucrose is a strong electrolyte.

D. Electrolyte solutions conduct heat.

E. NH3 is a weak electrolyte.


Solution

Establish the definition of electrolytes and examine each statement and determine which is true

Recall that electrolytes are classified as:

• Strong electrolytes: dissociate completely in water; include soluble ionic salts, strong acids, and bases

a. Ionic salts: those that follow the rules of being soluble in solubility rules

b. Strong acids: HCl, HBr, HI, HNO3, H2SO4, HClO4, HClO3

c. Strong bases: Group 1A and 2A (Ca and lower) metals paired with OH, H, O2–, or NH2

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