Question

The fizz produced when an alka-seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (nahco3) and citric acid (h3c6h5o7): 3nahco3(aq)+h3c6h5o7(aq)→3co2(g)+3h2o(l)+na3c6h5o7(aq) in a certain experiment 1.50 g of sodium bicarbonate and 1.50 g of citric acid are allowed to react.

Answer 1

The fizz produced when an Alka-Seltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate and citric acid, which produces carbon dioxide gas.

Step-by-step explanation:

The fizz produced when an Alka-Seltzer® tablet is dissolved in water is due to the reaction between sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The balanced chemical equation for this reaction is:

3NaHCO3(aq) + H3C6H5O7(aq) → 3CO2(g) + 3H2O(l) + Na3C6H5O7(aq)

When the sodium bicarbonate and citric acid react, they produce carbon dioxide gas, which causes the formation of bubbles or fizz. This reaction is commonly used in antacid tablets like Alka-Seltzer® to provide relief from heartburn or indigestion.

Answer 2

Answer is: sodium bicarbonate is the limiting reagent.

Balanced chemical reaction:

3NaHCO₃(aq) + H₃C₆H₅O₇(aq) → 3CO₂(g) + 3H₂O(l) + Na₃C₆H₅O₇(aq).

n(NaHCO₃) = m(NaHCO₃) ÷ M(NaHCO₃).

n(NaHCO₃) = 1.50 g ÷ 84 g/mol.

n(NaHCO₃) = 0.0178 mol.

n(H₃C₆H₅O₇) = 1.50 g ÷ 192.12 g/mol.

n(H₃C₆H₅O₇) = 0.0078 mol.

From chemical reaction: n(NaHCO₃) : n(H₃C₆H₅O₇) = 3 : 1.

n(NaHCO₃) : 0.0078 mol = 3: 1.

n(NaHCO₃) = 0.0234 mol; amount of substance need to react with citric acid, so we conclude there is no enough sodium bicarbonate.