Mole Ratios and Stoichiometry Concepts

Mole Ratios and Stoichiometry Concepts

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

This video tutorial introduces the concept of mole ratios and stoichiometry, using the analogy of recipes to explain balanced chemical equations. It provides examples, such as making s'mores, to illustrate how ingredients (or reactants) combine in specific ratios to form products. The video also covers how to translate these ratios into chemical equations and solve related problems using proportions and conversion factors. By the end, viewers should understand how to determine and use mole ratios in calculations.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is stoichiometry primarily concerned with?

The color change in chemical reactions

The physical state of reactants and products

The quantitative relationship between reactants and products

The qualitative relationship between reactants and products

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of the video, how is a balanced equation similar to a recipe?

It gives the nutritional value of the products

It provides the exact cooking time

It lists the ingredients needed for a reaction

It shows the ratio in which reactants combine

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many s'mores can be made with 6 chocolate squares, assuming excess graham crackers and marshmallows?

1 s'more

2 s'mores

3 s'mores

4 s'mores

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mole ratio of NaOH to Na2SO4 in the given chemical equation?

3:1

1:2

2:1

1:1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you have 3.2 moles of H2SO4, how many moles of H2O can be produced assuming excess NaOH?

6.4 moles

3.2 moles

9.6 moles

1.6 moles

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method can be used to solve mole ratio problems?

Using a proportion

Using a graph

Using a thermometer

Using a color chart

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the mole ratio of hydrogen to ammonia in the example problem?

1:2

3:2

2:3

1:1

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