Which of the following equations is correctly balanced for the reaction between calcium hydroxide and nitric acid to produce calcium nitrate and water?
Show the answer and explanation
Correct answer
A. Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O
Principle or equation
Balanced chemical equations have equal numbers of each atom on both sides.
Why this answer is correct
Calcium hydroxide reacts with nitric acid in a 1:2 ratio. The balanced equation is Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O, with 1 Ca, 2 N, 6 H, and 8 O on each side.
Example
For NaOH + HCl, the balanced equation is NaOH + HCl → NaCl + H2O.
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