Balancing Chemical Equation

Q.

Write the balanced equation for hydrogen + chlorine → hydrochloride.

Q.

Translate the following statement into chemical equation and balance the equation:

Barium chloride reacts with zinc sulphate to give zinc chloride and barium sulphate.

Q.

Complete and balance the following reaction:

$$\begin{gathered} \mathrm{Cu}+{\mathrm{O}}_2\stackrel{}{\to }\mathrm{\_\_\_\_\_\_} \\ \left(\mathrm{black}\right) \end{gathered}$$

Q.

Balance the following equation:

Al₂O₃ + H₂SO₄ $\to$Al2(SO₄)₃ + H₂O

Q.

How is a chemical equation balanced?

Q. How many water molecules are present in the balanced chemical equation of the following reaction? ​
$C{H}_4+O_2\to C{O}_2+H_{2}O$

1. 1
2. 2
3. 3
4. 4

Q. Balance the following equation.
$ZnC{O}_3⟶ZnO+C{O}_2$

Q.

B. Statements given below are incorrect. Write the correct statements :

2. A balanced chemical equation consists of formulae of reactants connected by a (+) plus sign and is equal to (=) followed by the formulae of products, connected by the (+) plus sign.

Q.

$H_2\left(g\right)+V_2{O}_5\left(s\right)\to V_2{O}_3\left(s\right)+H_{2}O\left(l\right)$
Let the coefficients for the given reaction be as follows:
$a{H}_2\left(g\right)+b{V}_2{O}_5\left(s\right)\to c{V}_2{O}_3\left(s\right)+d{H}_{2}O\left(l\right)$
What will be the equations for the number of atoms for each element, so that each is balanced?

1. 2a = 2d, 2b = 2d, 2c = d

2. a = d, B = 2c, 5b = 3c + d

3. a = 2d, b = c, 5b = 3c + d

4. a = d, b = C, 5b = 3c + d

Q.

Methane gas $(C{H}_4$) when burns with oxygen $(O_2$) gives carbon dioxide and water. Write the balanced chemical equation and provide the following information in terms of reactants and products in the equation. [5 Marks]
(a) no. of molecules
(b) no. of moles
(c) molar mass
(d) total mass of reactants and products
What does statement (d) infer?

Q.

What will be a, b and c for the following reaction to be balanced?

$aFeC{l}_3+bMgO\to cF{e}_2{O}_3+dMgC{l}_2$

1. a = $2$, b = $3$, c = $3$, d = $4$

2. a = $2$, b = $4$, c = $3$, d = $3$

3. a = $1$, b = $\frac{3}{2}$, c = $\frac{1}{2}$, d = $2$

4. a = $1$, b = $\frac{3}{2}$, c = $\frac{1}{2}$, d = $\frac{3}{2}$

Q. Find ‘x’ and ‘y’ in order to balance the given equation.
${\text{C}}_6{\text{H}}_{12}{\text{O}}_6+x{\text{O}}_2\to 6{\text{CO}}_2+y{\text{H}}_2\text{O}$

1. x = 1; y = 2
2. x = 4; y = 6
3. x = 6; y = 4
4. x = 6; y = 6

Q. How to balance equations?

Q. $H_2\left(g\right)+V_2{O}_5\left(s\right)\to V_2{O}_3\left(s\right)+H_{2}O\left(l\right)$
Let the coefficients for the given reaction be as follows:
$\left(A\right)H_2\left(g\right)+\left(B\right)V_2{O}_5\left(s\right)\to \left(C\right)V_2{O}_3\left(s\right)+\left(D\right)H_{2}O\left(l\right)$
What will be the equations for the number of atoms for each element, so that each is balanced?

1. A = D, B = C, 5B = 3C + D
2. A = D, B = 2C, 5B = 3C + D
3. 2A = 2D, 2B = 2D, 2C = D
4. A = 2D, B = C, 5B = 3C + D

Q.

In the following reaction,
$3Fe$ + $4H_{2}O$ $\to$ $F{e}_3{O}_4$ + $d{H}_2$.
Find the value of d.

1. 3

2. 4

3. 2

4. 1

Q.

$H_2\left(g\right)+V_2{O}_5\left(s\right)\to V_2{O}_3\left(s\right)+H_{2}O\left(l\right)$
Let the coefficients for the given reaction be as follows:
$a{H}_2\left(g\right)+b{V}_2{O}_5\left(s\right)\to c{V}_2{O}_3\left(s\right)+d{H}_{2}O\left(l\right)$
What will be the equations for the number of atoms of each element, so that each is balanced?

1. a = d, b = c, 5b = 3c + d

2. a = d, b = 2c, 5b = 3c + d

3. a = 2d, b = c, 5b = 3c + d

4. 2a = 2d, 2b = 2d, 2c = d

Q. Find the value $b+c$ (sum of coefficients of reactants) from the given chemical equation:
$aFe+b{H}_{2}O\to cF{e}_3{O}_4+H_2$

1. 4
2. 7
3. 6
4. 5

Q.

Complete the following reactions(balance each equation and name the product):

$\underset{\mathrm{Carbon}}{\mathrm{C}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to$

Q. Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

The balanced chemical equation for the following word equation is:

1. ${\text{Ca(OH)}}_2\text{(aq)}+{\text{CO}}_2\text{(g)}\to {\text{CaCO}}_3\text{(aq)}+{\text{H}}_2\text{O}\text{(l)}$
2. ${\text{Ca(OH)}}_2\text{(aq)}+2{\text{CO}}_2\text{(g)}\to 2{\text{CaCO}}_3\text{(aq)}+{\text{H}}_2\text{O(l)}$
3. $2{\text{Ca(OH)}}_2\text{(aq)}+{\text{CO}}_2\text{(g)}\to 2{\text{CaCO}}_3\text{(aq)}+2{\text{H}}_2\text{O(l)}$
4. $2{\text{Ca(OH)}}_2\text{(aq)}+{\text{CO}}_2\text{(g)}\to {\text{CaCO}}_3\text{(aq)}+2{\text{H}}_2\text{O(l)}$

Q.

Complete the following reactions(balance each equation and name the product

$\underset{\mathrm{Sulphur}}{\mathrm{S}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to$

Q.

Find the value of a, b, c, and d in accordance with the law of conservation of mass for the reaction given below.
$aM{g}_3{N}_2\left(s\right)+b{H}_{2}O\left(l\right)\to cMg\left(OH{)}_2\right(aq)+dN{H}_3(aq)$

1. a, b, c and d are 1, 3, 4 and 2 respectively.

2. a, b, c and d are 2, 6, 3 and 2 respectively.

3. a, b, c and d are 1, 6, 2 and 3 respectively.

4. a, b, c and d are 1, 6, 3 and 2 respectively.

Q. $H_2\left(g\right)+V_2{O}_5\left(s\right)\to V_2{O}_3\left(s\right)+H_{2}O\left(l\right)$
Let the coefficients for the given reaction be as follows:
$w{H}_2\left(g\right)+x{V}_2{O}_5\left(s\right)\to y{V}_2{O}_3\left(s\right)+z{H}_{2}O\left(l\right)$
What will be the values of w, x, y and z so that the reaction is balanced?

1. w = z, x = 2y, 5x = 3y + z
2. w = z, x = y, 5x = 3y + z
3. w = 2z, x = y, 5x = 3y + z
4. 2w = 2z, 2x = 2z, 2y = z

Q. When hydrogen is passed over a black solid compound $A$, the products are a colorless liquid and reddish-brown metal $B$.
Substance $B$ is divided into two parts, each placed in separated test tubes.
Dilute $HCl$ is added to one part of substance $B$ and dilute $HN{O}_3$ to the other.
Write an equation for the reaction between hydrogen and substance $A$.

Q. What will be the values of the coefficients x, y and z if the given reaction is balanced?

${\text{xFeCl}}_3+\text{yMgO}\to {\text{Fe}}_{\text{2}}{\text{O}}_3+{\text{zMgCl}}_2$

1. x = 2, y = 3, z = 3
2. x = 3, y = 2, z = 2
3. x = 2, y = 4, z = 3
4. x = 3, y = 2, z = 3

Q. Choose the correct coefficients to completely balance the following reaction.
$a(N{H}_4{)}_{3}P{O}_4$ + $bPb(N{O}_3{)}_4$ $\to$ $cP{b}_3(P{O}_4{)}_4$ + $dN{H}_{4}N{O}_3$

1. a=2, b=6, c=1, d=10
2. a=3, b=4, c=1, d=12
3. a= 4, b=3, c=12, d=1
4. a=4, b=3, c=1, d=12

Q. Balanced chemical equations are equations in which the number of each type of atoms on the reactant side may or may not be equal to the number of respective atoms on the product side.

1. False
2. True

Q. Balancing of a chemical equation is based on which of the following laws?

1. Law of constant proportions
2. Law of multiple proportions
3. Law of conservation of mass
4. Avogadro's law

Q.

Identify the correct balanced equation from the following chemical reactions.

1. ${\text{2NaHCO}}_3\to \text{5}{Na}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$

2. ${\text{CaC}}_2+{\text{H}}_2\text{O}\to {\text{C}}_2{\text{H}}_2+{\text{Ca(OH)}}_2$

3. $\text{2HgO}\to {\text{3Hg + 4O}}_2$

4. ${\text{2ClO}}_2+{\text{H}}_2\text{O}\to {\text{HClO}}_2+{\text{HClO}}_3$