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11 December, 23:46

When baking soda (sodium bicarbonate or sodium hydrogen carbonate, NaHCO3) is heated, it releases carbon dioxide gas, which is responsible for the rising of cookies, doughnuts, and bread.

a) Write a balanced equation for the decomposition of the compound (one of the products is Na2CO3).

b) Calculate the mass of NaHCO3 required to produce 20.5 g of CO2.

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  1. 12 December, 00:15
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    a. NaHCO₃ + HCl → NaCl + H₂O + CO₂

    b. 39.14 g is the mass of NaHCO₃ required to produce 20.5 moles of CO₂

    Explanation:

    A possible reaction for NaHCO₃ to make dioxide is this one, when it reacts with hydrochloric to produce the mentioned gas.

    NaHCO₃ + HCl → NaCl + H₂O + CO₂

    Ratio in this reaction is 1:1

    So 1 mol of baking soda, produce 1 mol of CO₂

    Let's calculate the moles

    20.5 g CO₂ / 44 g/m = 0.466 moles

    This moles of gas came from the same moles of salt.

    Molar mass baking soda = 84 g/m

    Molar mass. moles = mass

    84 g/m. 0.466 moles = 39.14 g
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