What is the reaction of sprite with alka-seltzer?

When Sprite, a carbonated beverage, is mixed with Alka-Seltzer, a medication containing citric acid and sodium bicarbonate, a chemical reaction occurs. The citric acid in the Alka-Seltzer reacts with the sodium bicarbonate to produce carbon dioxide gas. This gas is released as bubbles, causing the Sprite to fizz and bubble up rapidly. This reaction is similar to the fizzing that occurs when Alka-Seltzer is dissolved in water, but the carbonation in the Sprite enhances the effect.