Now, we are going to add in Sodium bicarbonate (Baking soda), Na2(HCO3)1 (solid form), to the drink. However, Sodium bicarbonate reacts with the Citric acid to produce an acid and a salt in a double replacement reaction. Write the balance equation below:
Remember, the Citric acid (H3C6H5O7)is called triprotic acid since 3 of H are used as H+ and the other 5 do not).
But the acid does not stay together but instead form a gas and water, so the above equation becomes:
This is the third type of double replacement reactions that occur, "presence of a gas".
To determine how much Sodium bicarbonate the your "existing citric acid/sugared drink", you need to stoichiometry calculation.
Once you have the mass of sodium bicarbonate to react with all the citric acid (this is called Stoichiometric amount so there is no limiting reactant or both are reactant are), you will need to determine the amount of gas you are going to generate.
Here is the link for Gas Generation calculations, Gas Generation (under water and not) and Molar Volume of Gas Law
We are assuming that the gas is at room temperature (°C) so check/write down room temperature each day.
You have 3 tries at getting the right "recipe of citric acid, sodium bicarbonate and sugared drink".
Here is a link to Limiting reactant problems just in case you need to do that calculations,