Question

6. Balance the following chemical equations.
(a) HNO, + Ca(OH), → Ca(NO3)2 + H2O
(b)
NaOH + H SO, → Na2SO, +H2O
(c) NaCl + AgNO, → AgCl + NaNO,
(d) BaCl, + H2SO, BaSO, + HCI​

Answer 1

(a)

$\checkmark$ Given Chemical Equation

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

$\checkmark$ Balanced Chemical Equation

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

$\star$ Verification of Balanced Equation

Both reactants and products contain

• H = 4 atoms
• N = 2 atoms
• O = 8 atoms
• Ca = 1 atom

Hence, Chemical Equation is Balanced

(b)

$\checkmark$ Given Chemical Equation

$\green{\sf NaOH+H_{2}SO_{4} \longrightarrow Na_{2}SO_{4}+H_{2}O}$

$\checkmark$ Balanced Chemical Equation

$\orange{\sf 2NaOH+H_{2}SO_{4} \longrightarrow Na_{2}SO_{4}+2H_{2}O}$

$\star$ Verification of Balanced Equation

Both reactants and products contain

• Na = 2 atoms
• O = 6 atoms
• H = 4 atoms
• S = 1 atom

Hence, Chemical Equation is Balanced

(c)

$\checkmark$ Given Chemical Equation

$\red{\sf NaCl+AgNO_{3} \longrightarrow AgCl+NaNO_{3}}$

$\checkmark$ Balanced Chemical Equation

$\pink{\sf NaCl+AgNO_{3} \longrightarrow AgCl+NaNO_{3}}$

$\star$ Verification of Balanced Equation

Both reactants and products contain

• Ag = 1 atom
• NO₃ = 1 atom
• Na = 1 atom
• Cl = 1 atom

Hence, Chemical Equation is Balanced

(d)

$\checkmark$ Given Chemical Equation

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

$\checkmark$ Balanced Chemical Equation

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

$\star$ Verification of Balanced Equation

Both reactants and products contain

• Ba = 1 atom
• Cl = 2 atoms
• H = a toms
• S = 1 atom
• O = 4 atoms

Hence, Chemical Equation is Balanced

Answer 2

Explanation:

ʙᴀʟᴀɴᴄᴇ ᴄʜᴇᴍɪᴄᴀʟ ᴇǫᴜᴀᴛɪᴏɴ:

✍A balanced chemical reaction is an equation that have equal numbers of each type of atom on both sides of the arrow.

✍A chemical equation is a written symbolic representation of a chemical reaction. The reactant chemical(s) are given on the left-hand side and the product chemical(s) on the right-hand side. The law of conservation of mass states that no atoms can be created or destroyed in a chemical reaction, so the number of atoms that are present in the reactants has to balance the number of atoms that are present in the products.

ʙᴀʟᴀɴᴄᴇᴅ ᴄʜᴇᴍɪᴄᴀʟ ᴇǫᴜᴀᴛɪᴏɴ:

a) 2HNO3+Ca(OH)2➡Ca(NO3)2+2H2O

b)2NaOH+H2SO4➡Na2SO4+2H2O

C) NaCl+AgNO3➡AgCl+NaNO3

d) BaCl2+H2SO4➡BaSO4+2HCl