Question

File Tools View PROTECTED VIEW Be careful-files from the internet can contain viruses. Unless you need to edit, it's safer to stay in Protected View. 4. A student investigated the diffusion of ammonia gas, NH3, and hydrogen chloride gas, HCl. Two sets of apparatus were set up as shown at room temperature and pressure. source of ammonia gas apparatus 1 damp red litmus paper TERMI PRACTICE WS[2] (Protected View) - Word Enable Editing source of hydrogen chloride gas B 64 seconds C 30 seconds D 21 seconds apparatus 2 damp blue litmus paper The damp red litmus paper in apparatus 1 changed colour after 30 seconds. H How long does it take for the damp blue litmus paper to change colour in apparatus 2? ​

Answer 1

The color of the damp blue litmus paper in apparatus 2 will change after 30 seconds.

In the given experiment, two sets of apparatus are set up to investigate the diffusion of ammonia gas, NH3, and hydrogen chloride gas, HCl. One set of apparatus contains damp red litmus paper, and the other set contains damp blue litmus paper.

The damp red litmus paper in apparatus 1 changes color after 30 seconds when exposed to ammonia gas.

Therefore, we can conclude that the damp blue litmus paper in apparatus 2 will also change color after 30 seconds when exposed to hydrogen chloride gas.