Green Chemistry - Principle 4

The video tutorial discusses the role of solvents in chemical reactions, highlighting how they dissolve solutes to enable reactions. It addresses the environmental concerns associated with organic solvents, which are derived from crude oil and contribute to pollution. The video introduces green chemistry, focusing on the development of safer solvents like supercritical water and carbon dioxide. These alternatives are non-flammable and environmentally friendly, offering benefits to industries such as dry cleaning and textiles.

What is the primary function of a solvent in a chemical reaction?

• To change the color of the solution

• To act as a catalyst

• To dissolve a solute

• To increase the temperature

Why are organic solvents considered environmentally unfriendly?

• They are biodegradable

• They are derived from renewable resources

• They contribute to greenhouse gas emissions

• They are non-toxic

What is a key goal of green chemistry?

• To reduce the cost of chemical processes

• To eliminate the use of all solvents

• To develop safer and more sustainable solvents

• To increase the use of organic solvents

What is a unique property of supercritical carbon dioxide and water?

• They are only used in the food industry

• They are highly flammable

• They exist as a solid, liquid, and gas simultaneously

• They are difficult to obtain

How can the use of carbon dioxide as a solvent benefit the environment?

• By increasing carbon emissions

• By making chemical processes more expensive

• By reducing the need for organic solvents

• By decreasing the efficiency of reactions