Catalysts Chemistry

The high demand for products leads to high waste generation from the chemical industries. How can industries keep up with the demand, while also making processes generate less waste? Select two.

• using higher temperatures inside the reactor

• using catalysts to obtain a higher yield of products

• treating wastes so they do not pollute the environment

• recycling remnant feedstocks back into the reactor batch

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-PS1-6

Which two changes to a production process will reduce the number of solvents and reduce the activation energy needed to run a reaction?

• Designing a process to run at ambient temperature and pressure will reduce the number of solvents; eliminating or combining reaction steps will reduce the activation energy.

• Eliminating or combining reaction steps will reduce the number of solvents; using catalysts will reduce the activation energy.

• Using catalysts will reduce the number of solvents; eliminating or combining reaction steps will reduce the activation energy.

• Eliminating or combining reaction steps will reduce the number of solvents; designing a process to run at ambient temperature and pressure will reduce the activation energy.

Tags

NGSS.HS-ETS1-2

NGSS.HS-ETS1-3

Chemical industries generate hazardous waste and other by-products during the production phase. What would be the greenest ways to manage waste generated during the production phase? Select two.

• using feedstocks from biological sources

• using a greater number of solvents in the chemical process

• recycling catalysts, and thus increasing the life cycle of the catalyst

• using a process with more catalytic steps between the starting material and product

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

Which of the following are one of the 12 Principles of Green Chemistry? Select two.

• Waste Treatment

• Atom Economy

• Designing Safer Catalyst

• Designing Safer Chemicals

What does catalyst do to a reaction?

• Slows down the reaction

• Nothing changes

• Speeds up the reaction

Tags

NGSS.HS-PS1-5

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by making them more available

• by giving them more energy

Tags

NGSS.HS-PS1-5

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction.

• catalyst

• reactant

• product

• solute

Tags

NGSS.HS-PS1-5

Which of the reaction pathway shows the catalysed reaction?

• 1

• 2

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-6

What happen to the rate of reaction when a catalyst is added to it?

• Increases

• Decreases

• Nothing changes

Tags

NGSS.HS-PS1-5

Catalysts may be in the state of ___________.

• Solid and liquid only

• Liquid and gases only

• Solid and gases only

• Solid, liquid or gases