$$3NaHCO3 + C6H8O7 \rightarrow 3CO2 + 3H2O + Na3C6H5O7$$
>This reaction produces carbon dioxide gas (CO2), water (H2O), and sodium citrate (Na3C6H5O7). The release of CO2 gas causes the fizzing and bubbling that is characteristic of Alka-Seltzer tablets.
The rate of this reaction is affected by several factors, including the temperature of the water. In general, the reaction rate increases as the temperature of the water increases. This is because the higher the temperature, the more kinetic energy the particles in the water have. This means that they are more likely to collide with each other and react.
This increased kinetic energy also speeds up the diffusion of the reactants. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. The higher the temperature, the faster the diffusion rate. This means that the reactants are more likely to come into contact with each other and react.
For these reasons, warm water dissolves Alka-Seltzer tablets faster than cold water.
