Waec Model Questions Vol1 2022 Chemistry Question 4
Practice practical question 4 from the 2022 Waec Model Questions Vol1 Chemistry examination. This question covers Mole Concept .
A student carries out the reaction between sodium carbonate and hydrochloric acid to evolve carbon dioxide gas. The procedure is as follows: 1. Accurately weigh 2.00 g of solid Na₂CO₃ and transfer it into a 250 mL conical flask. 2. Add excess dilute HCl (0.1 M) to the flask and immediately fit a delivery tube leading to an inverted, water‑filled 500 mL graduated cylinder (the gas collection over water set‑up). 3. Record the volume of gas collected when the reaction is complete. The temperature of the water bath is 25 °C and the atmospheric pressure is 760 mm Hg. The vapour pressure of water at 25 °C is 23.8 mm Hg. 4. The theoretical stoichiometry for the reaction is: Na₂CO₃ + 2 HCl → 2 NaCl + H₂O + CO₂(g). The volume of gas collected is 450 mL. Using the data above, answer the following questions:
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This is Waec Model Questions Vol1 2022 Chemistry Question 4. It is a practical question from the 2022 Waec Model Questions Vol1 Chemistry examination.
The question covers Mole Concept .
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