Sodium Carbonate is not a gas it is a solution. I think you mean how can you test for Carbon Dioxide - bubble it though limewater and you will get Sodium Carbonate.
Sodium carbonate solution is basic in nature after acid hydrolysis of polysaccharide sodium carbonate is added in test tube to neutralize acidic effect and to rise the ph value with the evolvement of carbondioxide gas the reaction between sodium carbonate and hcl gives rise to sodium bicarbonate and sodium chloride sodium bi carbonate is then reacted with hcl to form sodium chloride ,water and carbon dioxide
The gas evolved is carbon dioxide. The test is that it turns lime water milky.
- use a flame test to distinguish between sodium and potassium - use flame photometry to determine sodium and potassium - heat sodium carbonate and collect the gas in a beaker with water: the gas released is carbon dioxide; see the bubbles. Measure the pH; it will be more than 7.
sodium carbonate doesn't give any gas on heating. its sodium bi-carbonate which gives co2 on heating.
carbondioxide
Na2CO3--------Na2O + CO2 Carbon dioxide is released by the thermal decomposition of sodium carbonate.
Carbon dioxide
To test presence of Sodium ions, do a flame test: color observed: golden yellow. To test presence of carbonate or hydrogen carbonate ions: Take some of the sodium hydrogen carbonate in a dry test tube. Heat the test tube and bubble the gas through limewater. Limewater turns milky. Carbonate or hydrogen carbonate ions present. To distinguish between carbonate and hydrogen carbonate: Add indicator solution. If colour of solution turns green, pH is 7-8, hydrogen carbonate ions are present. If colour of solution turns blue, pH is 12-13, carbonate ions are present. -Iberuz
yes
oxygen
Carbon dioxide.
You get solid sodium carbonate, carbon dioxide gas, and water vapor or... Na2CO3(s) + CO2(g) + H2O(g)