Question

Equation balancing

a. S(s) + O2(g) → SO3(g)
b. 2Al(s) + 3Cl2(g) ► 2AICI3(s)
E. 2NaOH(s) + H2SO4(ac) —Na2So (ac) + H2O(l)
d. C3H8(g) + 50(g) -3C02(g) + 4H2O(g)

Answer 1

For a: The balanced equation is
`2S(s)+3O_2(g)\rightarrow 2SO_3(g)`

For c: The balanced equation is
`2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)`

Step-by-step explanation:

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

• For (a):

The given unbalanced equation follows:

`S(s)+O_2(g)\rightarrow SO_3(g)`

To balance the equation, we must balance the atoms by adding 2 infront of both
`S(s)` and
`SO_3` and 3 in front of
`O_2`

For the balanced chemical equation:

`2S(s)+3O_2(g)\rightarrow 2SO_3(g)`

• For (b):

The given balanced equation follows:

`2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3(s)`

The given equation is already balanced.

• For (c):

The given unbalanced equation follows:

`2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+H_2O(l)`

To balance the equation, we must balance the atoms by adding 2 infront of
`H_2O(l)`

For the balanced chemical equation:

`2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)`

• For (d):

The given balanced equation follows:

`C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)`

The given equation is already balanced.