Concentrations and Dilutions Review

Reorder

Order the following steps to show how properly make a solution.

• Determine the mass of solute needed to have the correct number of moles in the solution

• Use a balance to measure out the correct mass of solute.

• Add the solute to a graduated cylinder or volumetric flask

• Add water until the desired volume is reached

• Stir the solution until all the solute is dissolved

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Question #1

Hotspot

Select the variables that you are GIVEN in the equation.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Convert grams to moles, and then divide moles by concentration to get volume.

• Divide moles by concentration to get volume

• Multiply concentration by volume to get moles, then convert moles to grams

• Convert grams to moles, and then divide moles by volume to get concentration

• Multiply mles by concentration to get volume

Fill in the Blanks

Question #2

Hotspot

Select the variables that you are GIVEN in the equation.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Convert grams to moles, and then divide moles by concentration to get volume.

• Divide mass by volume to get concentration

• Multiply concentration by volume to get moles, then convert moles to grams

• Convert grams to moles, and then divide moles by volume to get concentration

• Multiply mass by volume to get concentration

Fill in the Blanks

Question #3

Hotspot

Select the variables that you are GIVEN in the equation.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Convert grams to moles, and then divide moles by concentration to get volume.

• Divide mass by volume to get concentration

• Multiply concentration by volume to get moles, then convert moles to grams

• Convert grams to moles, and then divide moles by volume to get concentration

• Multiply mass by volume to get concentration

Fill in the Blanks

Question #4

Hotspot

Select the variables that you are GIVEN in the equation.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Multiply concentration by volume to get moles

• Divide concentration by volume to get grams

• Multiply concentration by volume to get moles, then convert moles to grams

• Divide concentration by volume to get moles, then convert moles to grams

• Multiply concentration by volume to get grams

Fill in the Blanks

Question #5

Hotspot

Select the variables that you are GIVEN in the problem.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Multiply concentration by volume to get moles

• Divide concentration by volume to get grams

• Multiply concentration by volume to get moles, then convert moles to grams

• Divide concentration by volume to get moles, then convert moles to grams

• Multiply concentration by volume to get grams

Fill in the Blanks

Question #6

Hotspot

Select the variables that you are GIVEN in the problem.

Multiple Choice

Which of the following correctly describes the steps you need to take to solve this problem?

• Convert grams to moles, and then divide moles by concentration to get volume.

• Divide mass by concentration to get volume

• Convert grams to moles, and then multiply moles by concentration to get volume/

• Convert grams to moles, and then divide moles by volume to get concentration

• Multiply mass by concentration to get volume

Fill in the Blanks

Example A

​!!!!CHANGE 20 mL to 0.020 L!!!!!

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Multiple Choice

Which equation shows the proper way to solve Example Problem A?

• $$\frac{\left(4.0\ M\right)\left(0.020\ L\right)}{\left(2.5\ L\right)}$$

• $$\frac{\left(4.0\ M\right)\left(2.5\ L\right)}{\left(0.020\ L\right)}$$

• $$\frac{\left(0.020\ L\right)\left(2.5\ L\right)}{\left(4.0\ M\right)}$$

• $$\frac{\left(4.0\ M\right)}{\left(0.020\ L\right)\left(2.5\ L\right)}$$

• $$\left(4.0\ M\right)\times\left(2.5\ L\right)\times\left(0.020\ L\right)$$

Fill in the Blanks

Multiple Choice

What are the units to the answer o Example Problem A?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Example B

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Multiple Choice

Which equation shows the proper way to solve Example Problem B?

• $$\frac{\left(4.0\ M\right)\left(0.100\ mL\right)}{\left(0.5\ M\right)}$$

• $$\frac{\left(4.0\ M\right)\left(0.5\ M\right)}{\left(0.100\ mL\right)}$$

• $$\frac{\left(0.100\ mL\right)\left(0.5\ M\right)}{\left(4.0\ M\right)}$$

• $$\frac{\left(4.0\ M\right)}{\left(0.100\ mL\right)\left(0.5\ M\right)}$$

• $$\left(4.0\ M\right)\times\left(0.5\ M\right)\times\left(0.100\ mL\right)$$

Fill in the Blanks

Multiple Choice

What are the units to the answer of Example Problem B?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Question #1

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Multiple Choice

Which equation shows the proper way to solve Question #1?

• $$\frac{\left(2.0\ M\right)\left(1.0\ L\right)}{\left(1.0\ M\right)}$$

• $$\frac{\left(2.0\ M\right)\left(1.0\ M\right)}{\left(1.0\ L\right)}$$

• $$\frac{\left(1.0\ L\right)\left(1.0\ M\right)}{\left(2.0\ M\right)}$$

• $$\frac{\left(2.0\ M\right)}{\left(1.0\ L\right)\left(1.0\ M\right)}$$

• $$\left(2.0\ M\right)\times\left(1.0\ M\right)\times\left(1.0\ L\right)$$

Fill in the Blanks

Multiple Choice

What are the units to the answer of Question #1?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Question #2

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Multiple Choice

Which equation shows the proper way to solve Question #2?

• $$\frac{\left(0.453\ M\right)\left(0.550\ L\right)}{\left(0.050\ L\right)}$$

• $$\frac{\left(0.453\ M\right)\left(0.050\ L\right)}{\left(0.550\ L\right)}$$

• $$\frac{\left(0.550\ L\right)\left(0.050\ L\right)}{\left(0.453\ M\right)}$$

• $$\frac{\left(0.453\ M\right)}{\left(0.550\ L\right)\left(0.050\ L\right)}$$

• $$\left(0.550\ L\right)\times\left(0.050\ L\right)\times\left(0.453\ M\right)$$

Fill in the Blanks

Multiple Choice

What are the units to the answer of Question #2?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Question #3

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Fill in the Blanks

Multiple Choice

What are the units to the answer of Question #3?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Question #4

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Fill in the Blanks

Multiple Choice

What are the units to the answer of Question #4?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol

Question #5

Dropdown

Identify the variables given in the problem:

M1 = ​

Select answer

V1 = ​

Select answer

M2 = ​

Select answer

V2 = ​

Select answer

Fill in the Blanks

Multiple Choice

What are the units to the answer of Question #5?

• $$\frac{mol}{L}$$

• $$\frac{mol}{mL}$$

• L

• mL

• mol