Measuring Molar Volume Of A Gas Practical 1
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What is the Procedure of this Practical?
Place 20cm³ of 2dm³ of ethanoic acid in a boiling tube Set the apparatus as shown in the diagram Place 0.05g of CaCO3 in a test tube Weigh accurately Remove the bung from boiling tube,add calcium carbonate and close boiling tube as quickly as possible Once the reaction is over measure volume of gas collected in the gas syringe Record mass and volume Repeat experiment six times increasing mass of CaCO3 by 0.05g
What is the overall equation of this reaction
CaCO3+2CH3COOH—->Ca(CH3COO)2 +CO2+H20
How to reduce volume of gas lost in step 1
Reduce concentration of nitric acid
How to prevent CO2 loss when replacing the bung
Capture CO2 when removing the bung use a container/pot to contain CaCO3 Replace bung and shake
Explain 2 ways to improve inaccuracies such as high solubility of CO2 in water
Use a gas syringe Bubble CO2 through nitric acid