Why do effervescent tablets dissolve in water? Why do they dissolve faster in hot water? Why do effervescent tablets dissolve slower in carbonated soft drink than they do in water?

Expert Answers

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The chemical reaction that occurs when effervescent tablets are placed in water is as follows:

Reaction in Words: 

Citric Acid + Sodium Bicarbonate yields Water + Carbon Dioxide + Sodium Citrate

Reaction in Symbols:

~C_6H_8O_7 + ~3NaHCO_3  -> ~3H_2O + ~3CO_2 + ~Na_3C_6H_5O_7

How the Reaction Occurs:

  • Before the tablet is dissolved, the citric acid and sodium bicarbonate are in solid form and unable to react with one another.
  • In order for the citric acid and sodium bicarbonate to react, they must be dissolved in water. Dissolving breaks the two chemicals into their positive and negative ions. This enables them to come in contact and react with one another.

Why do effervescent tablets dissolve in water?

  • Citric acid is an acid and sodium bicarbonate is an...

(The entire section contains 379 words.)

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