This is a gas evolution reaction, CO2 is the formed gas.
Reactants:
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NaHSO4 – Sodium hydrogen sulfate
Other names: Sodium bisulfate, Sodium acid sulfate, Bisulfate of soda
Appearance: White solid
Na2CO3 – Sodium carbonate
Other names: Soda ash, Washing soda, Soda crystals
Appearance: White solid, hygroscopic ; White hygroscopic powder
Products:
Na2SO4
Names: Sodium sulfate, Sodium sulphate, Sulfate of sodium
Appearance: White crystalline solid | hygroscopic ; White hygroscopic solid in various forms
CO2
Names: Carbon dioxide, {{plainlist|, CO2
Appearance: Colorless gas ; Odourless colourless compressed liquefied gas ; Colorless, odorless gas. [Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxide
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
