Question

how can we balance chemical equation of nitric acid and calcium hydroxide

Answer 1

Nitric acid has the chemical formula HNO3, and Calcium Hydroxide has the chemical formula Ca(OH)2. When an acid and a base react with each other, the products that are formed is a salt (an ionic compound that is formed from a reaction between an acid and a base) and water.

So, acid + base ---> salt + water 

Now, to balance the equation, we have to make sure there are the same number of atoms (or ions) on both sides of the equation. Also, we must list the state of each compound in the equation.

HNO3 (aq) + Ca(OH)2 (aq) ---> Ca(NO3)2 (aq) + H2O (l)

Number of atoms before the reaction:
H = 3
N = 1
O = 5
Ca = 1
Number of atoms after the reaction:
H = 2
N = 2
O = 7
Ca = 1

There are not the same number of atoms on both sides of the equation, so we must balance it. Remember to place the balancing numbers in front of the chemical formulas.

2HNO3 (aq) + Ca(OH)2 (aq) ---> Ca(NO3)2 (aq) + 2H2O (l)

Number of atoms before the reaction:
H = 4
N = 2
O = 8
Ca = 1
Number of atoms after the reaction:
H = 4
N = 2
O = 8
Ca = 1

There are now the same number of atoms on both sides of the equation, so that is the balanced chemical equation between nitric acid and calcium hydroxide.

I hope that made it a bit easier :)

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Answer 2

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