Question

1. balance the following chemical reactions.

a) 2c + o₂→ co
b) cl₂ + nabr → br₂ + nacl
c) nh₃→ n₂ + h₂
d) na + h₂o → naoh + h₂
e) naoh + h₂s → na₂s + h₂o

Explanation:

Step1: Balance a)

Balance the carbon and oxygen atoms.
$2C + O_2
ightarrow 2CO$

Step2: Balance b)

Balance the chlorine, bromine and sodium atoms.
$Cl_2 + 2NaBr
ightarrow Br_2+2NaCl$

Step3: Balance c)

Balance the nitrogen and hydrogen atoms.
$2NH_3
ightarrow N_2 + 3H_2$

Step4: Balance d)

Balance the sodium, hydrogen and oxygen atoms.
$2Na + 2H_2O
ightarrow 2NaOH + H_2$

Step5: Balance e)

Balance the sodium, hydrogen, sulfur and oxygen atoms.
$2NaOH + H_2S
ightarrow Na_2S + 2H_2O$

Answer:

a) $2C + O_2
ightarrow 2CO$
b) $Cl_2 + 2NaBr
ightarrow Br_2+2NaCl$
c) $2NH_3
ightarrow N_2 + 3H_2$
d) $2Na + 2H_2O
ightarrow 2NaOH + H_2$
e) $2NaOH + H_2S
ightarrow Na_2S + 2H_2O$