Give two reasons why the crude product in most reactions is not pure.

1. inclusion of starting material

2. inclusion of side reaction material

One of the reasons that the crude product in most reactions is not pure is because the reaction is not complete and we have to do an additional step/steps of decolorization and crystallization to have a pure product that could be checked by its melting point

im not very sure about it...

Also because most of the times the crude product is only treated with water, which does not dissolve all the impurities found in the substance or mixture you started with.

There are typically two primary reasons why the crude product in most chemical reactions is not pure:

1. Side Reactions: During a chemical reaction, it is common for multiple reactions to occur simultaneously. These additional reactions, known as side reactions, can produce undesired products along with the desired product. Side reactions can be caused by factors such as impurities in the starting materials, unfavorable reaction conditions, or the presence of catalysts or impurities. As a result, the crude product is usually a mixture of the desired product and other unintended compounds.

2. Impurities: Impurities can be introduced into the reaction mixture from various sources. Starting materials may contain impurities due to the manufacturing process or storage conditions. Catalysts and reagents can also introduce impurities if they are not entirely pure. Additionally, the reaction environment itself, such as the solvent used, can contribute impurities to the final product. These impurities can impact the purity and quality of the crude product.

To obtain a purer product, purification techniques are often employed to separate the desired product from impurities and eliminate side products. Common purification methods include filtration, distillation, recrystallization, chromatography, and extraction, among others. These techniques help remove impurities and isolate the desired compound in its purest form.