Answers Chemistry Acid-Base Reactions — TestQuestion 18

18

QuizMultiple Choice

Acid-Base Reactions — Test

Question 18 • Chemistry

Which of these is the correctly balanced chemical equation for the reaction of Ca OH sub 2 and HNO sub 3 ?

Answer

A

Ca OH sub 2 plus 2 HNO sub 3 rightarrow cap h sub 2 cap o plus CaNO sub 3

B

Ca OH sub 2 plus HNO sub 3 rightarrow Ca raised to the 2 plus power plus NO sub 3 raised to the negative power

C

Ca OH sub 2 plus 2 HNO sub 3 rightarrow 2 cap h sub 2 cap o plus 2 NO sub 3 raised to the negative power

D

Ca OH sub 2 plus 2 HNO sub 3 rightarrow 2 cap h sub 2 cap o plus Ca open paren NO sub 3 close paren sub 2

Explanation

Calcium hydroxide has two OH groups, so it needs two HNO₃ molecules to provide two H⁺ ions and form 2 H₂O. The remaining Ca²⁺ combines with two NO₃⁻ ions to form Ca(NO₃)₂. Thus, Ca(OH)₂ + 2 HNO₃ → 2 H₂O + Ca(NO₃)₂ is balanced; this is choice D.

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