Question

How could you verify that you produced carbon dioxide in your combustion reaction? 2. what indication did you have that nh3 was produced in your decomposition reaction? 3. if you did not neutralize the saturated citric acid before you poured it down the drain describe the potential consequences to the plumbing and the environment?

Answer 1

1) Carbon dioxide is a gas, so when $CO_{2}$ is evolved in the reaction, it appears as bubbles. The gas released extinguishes the fire and it can turn lime water milky.

$Ca(OH)_{2} (aq) + CO_{2}(g) ----> CaCO_{3}(s) +H_{2}O(l)$

2) When $NH_{3}$ is released in a decomposition reaction we can identify by the strong pungent smell of the gas released.

3) Saturated citric acid can cause corrosion of the metal layers present in the pipes. So, before draining out any acid it is neutralized so that the pipes and other plumbing works do not get damaged leading to leaks in the drainage system.

Answer 2

CO2 turns lime water milky. NH3 has a pungent smell. Citric acid affects the plumbing of houses and lowers the pH of water bodies.

Carbon dioxide turns lime water milky. When the unknown gas is passed into lime water, the lime water turns milky. This is the way to verify that the gas produced in the reaction is carbon dioxide.

NH3 gas produces a pungent smell. The evolution of a gas that has  a pungent smell in the reaction is an indication that the gas produced in the reaction is NH3.

If citric acid is not neutralized before it is poured down the drain, it could lead to the corrosion of pipes and plumbing. Also, it could lowers the pH of water bodies thereby affecting aquatic life.

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