(1) Mixing sodium carbonate and citric acid in a solution produces carbon dioxide that shows a s fizz. Given the balanced equation below, (on question 11) What amount in grams if citric acid (C6H8O7) should be added to 0.5 gram sodium carbonate (NaHCO3) to have a complete reaction? 3 NaHCO3 (aq) + C6H8O7 (aq) ---> 3 CO2 (g) + 3 H2O (I) + Na3C6HsO7 (aq) Molar Masses. 1 mole of NaHCO3 = 84.01 grams of NaHCO3 1 mole of C6H8O7 = 192.12 grams of C6H8O7 Ratio: 3 mole of NaHCO3 = 1 mole of C6H8O7

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".