Answer: sulfuric acid.
- A sodium chloride
- B sulfuric acid
- C potassium hydroxide
- D nitric acid
Correct answer: B. sulfuric acid
Explanation: The lead-acid accumulator uses about 38% sulfuric acid as its electrolyte.
In a Daniell cell, electrons flow externally from the zinc anode (oxidation) through the voltmeter to the copper cathode (reduction), while the salt bridge completes the circuit.
Concept context
Explore the link between chemical reactions and electricity. Covers galvanic cells, electrolysis, standard electrode potentials, the Nernst equation, and real-world applications like batteries and corrosion.