Question

1. the decomposition of water can be accomplished when electricity is applied to water. this process is known as electrolysis.

the interactive shows a miniature hoffman apparatus that is used to run electricity through water. when the source of voltage is activated, the decomposition of water begins. the products of the decomposition are gasses collected in two test tubes.
near the halfway point of the video, you will see a splint test performed on gas 1 (left test tube).
observe and listen to the results of the splint test.
identify the product of the gas formed in test tube 1.
what is a splint test?
gas 1 is a gas that isnt any of the 3 options
gas 1 is steam (h₂o)
gas 1 is hydrogen
gas 1 is oxygen

Explanation:

Step1: Recall electrolysis of water

In electrolysis of water, water ($H_2O$) decomposes into hydrogen ($H_2$) and oxygen ($O_2$). The hydrogen gas is collected at the cathode and oxygen gas at the anode. Hydrogen gas burns with a pop - sound when a burning splint is brought near it.

Step2: Analyze splint test result

A splint test on hydrogen gas causes a pop - sound. In the electrolysis of water, hydrogen gas is produced in larger volume compared to oxygen gas and is usually collected in the tube connected to the negative terminal of the power source.

Answer:

Gas 1 is hydrogen