Use limewater (saturated calcium hydroxide solution). When you bubble CO2 through the limewater, it reacts to form calcium carbonate which makes it visibly cloudy.
Ca(OH)2 (aq) + CO2 (g) → CaCO3 (s) + H2O (l)
a place where you test gas
The test for hydrogen gas is called the "squeaky pop" test. This test involves igniting a sample of hydrogen gas, which produces a distinctive "squeaky pop" sound.
You can test for the presence of hydrogen gas using a lit splint test. When a lit splint is exposed to hydrogen gas, it will produce a squeaky pop sound, indicating the presence of the gas. This test is based on the highly flammable nature of hydrogen gas.
The amount of gas in test tubes can differ based on factors such as the volume of the test tubes, the pressure inside the test tubes, and the temperature of the gas. Different test tubes may contain different amounts of gas depending on these variables.
To confirm the presence of hydrogen gas, you take a lit splint and insert it into the test tube or the container with the gas, and there should be a loud 'pop' as the hydrogen gas ignites. This is the easiest and most effective test. http://www.gcsescience.com/itesthydrogen.htm
You can test the gas collected in electrolysis of water by performing the pop test. Collect the gas in a test tube, turn it upside down, and place a lit match at the opening of the tube. If the gas is hydrogen, it will make a "pop" sound when ignited. Another method is to test the gas with a lighted splint; if it reignites with a pop sound, it is likely hydrogen gas.
One way to test for the presence of oxygen gas is to use a glowing splint test. If the gas is oxygen, the glowing splint will relight when introduced into the gas due to oxygen's ability to support combustion.
Hydrogen gas makes the 'pop test' when it is ignited, producing a distinctive popping sound. This test is commonly used to detect the presence of hydrogen gas.
You can test for the evolution of hydrogen gas by collecting a gas sample from the reaction using a gas syringe or inverted test tube. You can then test this gas by lighting a flame at the mouth of the container to see if it ignites with a 'squeaky pop' sound characteristic of hydrogen gas. Alternatively, you can use a glowing splint to see if it reignites in the presence of hydrogen gas.
You can test for the gas produced by collecting it in a test tube and then performing tests like the "pop" test using a burning splint. The gas produced when sodium reacts with water is hydrogen gas, which will ignite with a "pop" sound when exposed to a flame.
If the gas in the test tube is hydrogen, the substance inside would be hydrogen gas since the gas in the tube is hydrogen itself.
For each gas exist a specific test; a general method is based on the infrared spectrometry.