A student heats 8.20 g of sodium ethanoate, CH₃COONa, with excess soda lime to make methane…
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A student heats of sodium ethanoate, , with excess soda lime to make methane. The yield is . The molar mass of the salt is . At the temperature of the experiment, and , one mole of gas occupies .
Find the moles of salt, the moles of methane collected and the volume of the methane.
Need a reminder? The key ideaShow
Hydrogenation and reduction of an alkyl halide keep the number of carbon atoms. The Wurtz reaction doubles the carbon atoms of the halide. Heating a sodium salt with soda lime removes the carboxyl carbon. Kolbe electrolysis joins two alkyl groups, each with the carboxyl carbon removed. An alkane has the formula .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The equation. . One mole of salt gives one mole of methane.
Step 2. Moles of salt. .
Step 3. Moles of methane. .
Step 4. Volume. .
Answer: of salt, of methane and .
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