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# How many grams of molecules can be formed? Identify reacion? Conversion factor, percent yeild

In the lab you add excess hydrochloric acid to 2.65g of Na2CO3. The balanced reaction is 2HCL (aq) + Na2CO3 (aq) ---> CO2 (g) + H20 (l) + 2NaCl (aq)

1) Identify the type of reaction

2) How many grams of gas molecules can be formed from this much Na2CO3? Show the calculation of the molar masses of all necessary substances before showing the calculation of theoretical yield.

3) Use the conversion factor ( 22.4L gas)/(1 mole gas) to find out how many liters of gas can be produced.

4) In the lab experiment you carefully collect all of the gas formed and find that there is 425.6mL of gas. What is your percent yield?

#### Solution Preview

1) Identify the type of reaction
This is a double displacement and decomposition reaction. In the double displacement part, the anions and cations of two different molecules switch places, forming two entirely different compounds. As a result, Carbonic Acid and Sodium Chloride are formed. Since Carbonic acid ...

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