Question

which of the following equations depicts a balanced equation, Na2CO3+2HCl=2NaCl+CO2+H2O, NaCO3+HCl=2NaCl+CO2+1H2O, 2Na2CO3+3HCl=3NaCl+2CO2+H2O or Na2CO3+HCl=NaCl+CO2+h2O??

Answer 1

Explanation:

The first one is balanced equation

Answer 2

Answer:

$Na_2CO_3+2HCl \Rightarrow 2NaCl+CO_2+H_2O$

Option A is the Answer

Explanation:

Balancing is making the number of atoms of each element same on both the sides  (reactant and product side).

To find the number of atoms of each element we multiply coefficient × subscript  

For example $5 Ca_1 Cl_2$ contains  

5 × 1 = 5 , Ca atoms and

5 × 2 = 10, Cl atoms  

If there is a bracket in the chemical formula  

For example $3Ca_3 (P_1 O_4 )_2$ we multiply coefficient × subscript × number outside the bracket.......... to find the number of atoms  (Please note: 3 is the coefficient, and if there is no number given then 1 will be the coefficient )

So 3 × 3 = 9, Ca atoms  

3 × 1 × 2 = 6, P atoms  

3 × 4 × 2 = 24, O atoms are present.

A)

$Na_2 CO_3+2HCl>2NaCl+CO_2+H_2 O$

Reactant Side       # of atoms of each element      Product Side

2                                            Na                                      2

1                                             C                                        1

3                                             O                                       3

2                                             H                                       2

2                                             Cl                                       2

Balanced!!!!

B)

$NaCO_3+HCl=2NaCl+CO_2+1H_2O$

(Chemical formula given for Sodium carbonate  is not correct)

Na2CO3 is the correct formula

C)

$2Na_2CO_3+3HCl=3NaCl+2CO_2+H_2O$

(Not balanced correctly)

Reactant Side       # of atoms of each element      Product Side

4                                            Na                                      3

2                                             C                                       2

6                                             O                                       5

3                                             H                                       2

3                                             Cl                                      3

Not same on both the sides

Hence  UnBalanced  

D)

$Na_2CO_3+HCl=NaCl+CO_2+h_2O??$

Unbalanced