The fizz produced when an Alka-Seltzer tablet isdissolved in water is due to the

Question

The fizz produced when an Alka-Seltzer tablet isdissolved in water is due to the reaction between sodiumbicarbonate ( g of citric acid are allowed to react. How many grams of carbon dioxide form? How many grams of the excess reactant remain after the limitingreactant is completely consumed? g of sodium bicarbonate and1.40 In a certain experiment 1.40 ): ) and citric acid(

Explanation / Answer

n(sodium bicarbonate) = m/M = 1.4/84.008 = 0.01667mol n(citric acid) = m/M = 1.4/192.124 = 0.007287mol Stoichiometry ratio = n(sodium bicarbonate)/n(citric acid) = 3/1 =3 Actual ratio = n(sodium bicarbonate)/n(citric acid) =0.01667/0.007287 = 2.28 Stoichiometry Ratio > Actual Ratio So, Sodium carbonate is the limiting reagent n(CO2) = 3/3 x n(sodium carbonate) = 0.01667mol m(CO2) = nM = 0.01667 x 44.01 = 0.734g n(Citric acid) in excess = 0.007287 - 1/3 x 0.01667 =0.001730mol m(citric acid) in excess = 0.001730 x 192.124 = 0.332g Hope this helps!

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