Review on Stoichiometry

Review on Stoichiometry

11th Grade

15 Qs

quiz-placeholder

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Review on Stoichiometry

Review on Stoichiometry

Assessment

Quiz

Science

11th Grade

Hard

NGSS
HS-PS1-7, MS-PS1-5

Standards-aligned

Created by

Lisa Thompson

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the percent yield of the following reaction if 145g of P2O5 reacts with 40 grams of water, but you only collected 112 grams of phosphoric acid? 3 H2O + P2O5 -> 2H3PO4 (Hint: You must calculate your theoretical yield FIRST and then calculate percent yield!)

27%

94%

77%

58%

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

If 5.0 grams of A react with 3.0 grams of B to produce C, and after the reaction, there are still 1.0 grams of B left, which is the limiting reagent?

A

B

C

Both A and B

Tags

NGSS.HS-PS1-7

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is percent yield?

The ratio of the actual yield to the theoretical yield, multiplied by 100%.

The percentage of the reactant that remains unreacted.

The percentage of the product that decomposes during the reaction.

The ratio of the theoretical reactant to the theoretical yield, multiplied by 100%.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What happens to the excess reagent after the reaction has gone to completion?

It continues to react until it is also consumed.

It is automatically converted into the product.

It remains in the reaction mixture.

It disappears without a trace.

Tags

NGSS.HS-PS1-7

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a reaction where A reacts with B to form C, if increasing the amount of A does not increase the amount of C produced, what does this indicate about A?

A is the limiting reagent.

A is the excess reagent.

A is not involved in the reaction.

A is completely consumed before B.

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Using the diagram, determine the limiting reactant. (The product formed is water.)

oxygen

hydrogen

none of the reactant are limiting

both hydrogen and oxygen

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

SO+ PCl--> SOCl+ POCl3
How much SOClis produced when 16.2g SOreact with 13.7g PCl5? 

7.87g

30.1g

26.4g

19.8g 

Tags

NGSS.HS-PS1-7

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