Question

★ Chemistry Problem !!

«» Balance the following equations :

• $\sf{ HNO_{3} \:+\: Ca(OH)_{2} \: \longrightarrow \: Ca(NO_{3})_{2} \:+\: H_{2}O }$

• $\sf{ BaCl_{2} \:+\: H_{2}SO_{4} \: \longrightarrow \: BaSO_{4} \:+\: HCl }$

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Answer 1

Explanation:

HNO3+Ca(OH)2= Ca(NO3)2+H2O

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Answer 2

Let's Understand first :

An equation is balanced when a same number of each element is represented on the reactant and product sides. Equations must balanced to accurately reflect the law of conservation of matter.

Explanation :

Question 1 :

$\bf{ HNO_{3} \:+\: Ca(OH)_{2} \: \longrightarrow \: Ca(NO_{3})_{2} \:+\: H_{2}O }$

Step I :

• To Balance the Hydrogen Atoms.

Here we can see that the reactant side is having 3 hydrogen atoms while product side is having 2 hydrogen atoms.

So, to balance the equation we need to add 2 before hydrogen on both sides of reactant and product.

$\bullet\ \ {\bf\pink{2}\sf HNO_{3} \:+\: Ca(OH)_{2} \: \longrightarrow \: Ca(NO_{3})_{2} \:+\: \bf\pink{2}\sf H_{2}O }$

Here, we can see that both the sides of the reaction is having 4 hydrogen atoms.

Step II :

• To balance the Oxygen, calcium and nitrogen atoms.

$\bullet\ \ \sf{ HNO_{3} \:+\: Ca(OH)_{2} \: \longrightarrow \: Ca(NO_{3})_{2} \:+\: H_{2}O }$

After the first step, we can see that the oxygen atoms on both the side is 8. So, oxygen atoms are balanced on both the sides.

Also, after the first step the nitrogen and calcium atoms also got balanced.

The balanced equation is,

$\bullet\ \ \boxed{\bf{2HNO_{3} \:+\: Ca(OH)_{2} \: \longrightarrow \: Ca(NO_{3})_{2} \:+\:2H_{2}O}}$

Question 2 :

$\bullet \ \ \bf{ BaCl_{2} \:+\: H_{2}SO_{4} \: \longrightarrow \: BaSO_{4} \:+\: HCl }$

From the above equation we can see that Barium, Sulphur and Oxygen atoms is already balanced.

We need to balance Hydrogen and Chlorine atoms.

Step I :

• To balance Hydrogen and Chlorine atoms.

Here we can see that the reactant side is having 2 hydrogen and Chlorine atoms while product side is having 1 hydrogen and Chlorine atom.

So, to balance the equation we need to add 2 before Hydrogen Chloride on reactant side.

$\bullet \ \ \sf{ BaCl_{2} \:+\: H_{2}SO_{4} \: \longrightarrow \: BaSO_{4} \:+\: \bf\pink{2}\sf HCl }$

Now, all the atoms are balanced.

The Balanced Equation is,

$\bullet \ \ \boxed{\bf{ BaCl_{2} \:+\: H_{2}SO_{4} \: \longrightarrow \: BaSO_{4} \:+\:2HCl }}$