In what type of container should silver nitrate solutions be stored if kept for long periods?

Storing silver nitrate solutions for extended periods requires considering their chemical properties and sensitivity to light. Silver nitrate is light-sensitive, meaning that exposure to light can cause it to decompose, leading to the formation of silver oxide and other products that diminish the effectiveness of the solution.

Using a well-stoppered dark-colored bottle serves two critical functions: it protects the solution from light exposure, which helps maintain its stability and potency over time, and the stopper minimizes contamination from the outside environment. The dark color of the bottle provides a barrier against light, while the secure stopper ensures that the solution is not inadvertently exposed to air or impurities that could also affect its integrity.

By storing silver nitrate in this manner, users can ensure that the solution remains viable for its intended applications, such as in latent print development or other laboratory uses. This method is a best practice in chemical storage, reflecting an understanding of the material's properties and the requirements for maintaining its usefulness.