Chemical Reaction Yields and Processes

The video tutorial explains the concept of yield in chemical reactions, distinguishing between actual and theoretical yield. It discusses reasons for discrepancies in yield, such as incomplete reactions, side reactions, and product loss. The tutorial also covers how to calculate percentage yield, using examples to illustrate the process.

What is the term used to describe the amount of product obtained from a chemical reaction?

• Chemical yield

• Product yield

• Actual yield

• Theoretical yield

If a reaction between hydrogen and oxygen is expected to produce 18 grams of water, but only 15 grams are obtained, what is the actual yield?

• 3 grams

• 15 grams

• 18 grams

• 20 grams

Which of the following is a reason why a reaction might not go to completion?

• The reaction is too fast

• The reaction is reversible

• The reactants are too pure

• The products are too stable

In a reversible reaction, what happens to the products?

• They form new compounds

• They convert back to reactants

• They disappear

• They remain unchanged

What is a side reaction?

• A reaction that does not occur

• A reaction that produces a different product

• A reaction that speeds up the process

• A reaction that produces the expected product

How can side reactions affect the yield of a desired product?

• They have no effect

• They stabilize the yield

• They increase the yield

• They decrease the yield

What is one way that product can be lost during a chemical process?

• By forming a solid

• By being too reactive

• By escaping as a gas

• By dissolving in water

When filtering a solution, why might not all of the liquid be captured?

• The funnel is too small

• The solution is too concentrated

• Some liquid remains in the beaker

• The filter paper is too thick

How do you calculate the percentage yield of a reaction?

• Add actual yield to theoretical yield

• Divide theoretical yield by actual yield and multiply by 100

• Divide actual yield by theoretical yield and multiply by 100

• Subtract actual yield from theoretical yield

In the example given, what is the percentage yield if the actual yield is 15 grams and the theoretical yield is 18 grams?

• 83.3%

• 90%

• 75%

• 100%