Which of the following electrolytes carries a positive charge?

• A. SO_4^{2-}
• B. Cl^-
• C. K^+
• D. Na^+

Answer: (D)

Verified step by step guidance

1. Identify the charge on each electrolyte by examining their chemical formulas and charge notations.
2. For \(SO_4^{2-}\), recognize that the superscript \$2-$ indicates it carries a negative charge (an anion).
3. For \(Cl^-\), note that the superscript \(-\) also indicates a negative charge (an anion).
4. For \(K^+\) and \(Na^+\), observe that the superscript \(+\) indicates a positive charge (cations).
5. Conclude that electrolytes with a positive charge are those with a \(+\) superscript, such as \(K^+\) and \(Na^+\).