Add 2 teaspoons of baking soda and 2 teaspoons of citric acid to the foam cup. Add the half cup of water to the cup and stir. What is the temperature?

2 Answer

  • Answer:

    Test for carbon dioxide gas.

    The reaction between baking soda and citric acid will form sodium ions, citric acid ions, carbon dioxide gas, and water. So all you have to do is add the gas produced (by gas displacement method or something) and test whether the gas is carbon dioxide, with lime water or other methods like hydrogencarbonate indicator. Hope this helped!


  • Answer:

    depends on amount, but the reaction's endothermic (meaning its cold, absorbs heat from surroundings)

    I hope it helps.