Which of the following chemical equations correctly represents the reaction between barium hydroxide and sulfuric acid to produce barium sulfate and water?
Show the answer and explanation
Correct answer
A. Ba(OH)2 + H2SO4 → BaSO4 + 2H2O
Principle or equation
Balanced chemical equations must have equal numbers of each atom on both sides and correct formulas for all reactants and products.
Why this answer is correct
Barium hydroxide is Ba(OH)2, sulfuric acid is H2SO4, barium sulfate is BaSO4, and water is H2O. Balancing: 1 Ba, 2 OH, 2 H, 1 SO4 on left; 1 Ba, 1 SO4, 2 H2O on right gives 2 H and 2 O in water, so balanced.
Example
For neutralization: 2NaOH + H2SO4 → Na2SO4 + 2H2O.
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