Question

H3C6H507(aq) + 3NaHCO3(aq) - Na3C6H5O7(aq) + 3C02(g) + 3__

Answer 1

Answer:

The missing compound is H2O

Explanation:

Step 1: Data given

H3C6H507(aq) + 3NaHCO3(aq) → Na3C6H5O7(aq) + 3C02(g) + 3

The reactants are : H3C6H507(aq) + 3NaHCO3(aq)

The products are: Na3C6H5O7(aq) + 3C02(g) and ....

Step 2:

The reactants have 11 H atoms (8 in H3C6H5O7(aq) and 3 in NaHCO3(aq))

The products have 5H atoms (in Na3C6H5O7(aq))

Here we miss 6 H atoms

The reactants have 3 Na atoms (in 3NaHCO3(aq))

The products have 3 Na atoms (in Na3C6H5O7(aq))

The amount of Na atoms on both sides is balanced. This means the missing compound is not NaOH

The reactants have 16 O atoms (7 in H3C6H507(aq) and 9 in 3NaHCO3(aq))

The products have 13 O atoms (7 in  Na3C6H5O7(aq) and 6 in 3C02(g))

Here we miss 3 O atoms

The reactants have 9 C atoms (6 in H3C6H507(aq) and 3 in 3NaHCO3(aq))

The products have 9 C atoms (6 in Na3C6H5O7(aq) and 3 in 3CO2(g))

The amount of C is balanced on both sides.

This means the missing compound will not have a C atom.

Option 1 (COH2) and option 4 (COOH) are not possible

The missing compound is H2O

Answer 2

Answer: 3 H₂O

Explanation:

This is an example of a common chemical reaction

ACID + CARBONATE --> SALT + WATER + CARBON DIOXIDE which implires

CITRIC ACID  + SODIUM BICARBONATE ----> SODIUM CITRATE + WATER + CARBON DIOXIDE .  

The full chemical equation is  given by

H3C6H5O7(aq)  + 3NaHCO3(aq) --> Na3C6H5O7(aq) + 3CO2(g) + 3H2O(l)

The reaction produces a  fizz due to the  release of  carbon dioxide which can be also seem when an Alka-Seltzer® tablet is dissolved in water.