## Answers to the Practice Problems

1. Answer = 70%

a. actual yield = 33g

Predicted yield =

1. grams/ GFW or 22.8/(23+34.45) = .3900769889

2. times the ratio (.3900769889)(1) = .3900769889

3. Times the GFW of the resuting compound (.3900769889)(23+1+32+4(16)) = 46.80923867

4. Actual/theorectical = 33/46.80923867 = .7049890351

5. x 100 = (.7049890351)(100) = 70.49890351% or 70%

70% is the percentage yield

2. Answer = 1.4 grams

1. grams/GFW or 4.17g/32GFW = .1303125

2. times the ratio 3:2 or 1:2/3 = (2/3)(.1303125) = .086875

3. Times the GFW of the resulting compound = (.086875)(44) = 3.8225 is the theorectical yield

4. Actual/Theorectical = percantage

5. x/3.8225 = 36.5/100

6. x = (3.8225)(.365) = 1.3952125 or 1.4

1.4g is the actual yield

3. Answer = 3.4 grams

1. grams/GFW or 12.4g/32GFW = .3875

2. times the ratio 11:8 1:8/11 = (8/11)(.3875) = .2818181818

3. times the GFW of the resulting compound = (.2818181818)(18) = 5.072727273

4. Actual/theorectical = percentage

5. x/5.072727273 = 66.6/100

6. x = (.666)(5.072727273) = 3.378436364 or 3.4

3.4g is the actual yield

4. Answer = 31.6%

a. Actual = .428 grams

1. grams/GFW or 3.61g/32GFW = .1128125

2. times the ratio 9:6 or 1:6/9 = (6/9)(.1128125) = .0752083333

3. times the GFW of the resulting compoudn = (.0752083333)(18)

4. Actual/theorectical = percentage

5. .428/1.35375 = percentage

6. .3161588181 x 100 = percentage

31.6% is the percentage yield

5. Answer = 82.9%

a. Actual = 84.9 grams

1. grams/GFW or 72.5 g/34 GFW = 2.132352941

2. times the ratio 2:3 or 1:3/2 = (3/2)(2.132352941) = 3.198528412

3. times the GFW of the resulting compound = (3.198528412)(32) = 102.3529412 grams

4. Actual/Theorectical = percentage

5. 84.9 grams/102.3529412 grams = percentage

6. percentage = .8294827586 x 100

82.9% is the percentage yield

6. Answer = 40.9%

a. Actual = 7.18 grams

1. grams/GFW or 55.7g/(6(12)+5(1)+35.45)GFW = .4953312583

2. times the ratio 4:2 or 1:1/2 = 1/2(.4953312583) = .2476656292

3. times the GFW of the resulting compound = (.2476656292)(70.9) = 17.55949311 grams

4. Actual/ Theorectical = percentage

5. 7.18 g/17.55949311 g = percentage

6. .4088956301 x 100 =percentage

40.9% is the percentage yield

7. Answer = 92.5 grams

1. grams/GFW or 59.2g/17GFW = 3.482352941

2. times the ratio 4:4 or 1:1 = 1(3.482352941) = 3.482352941

3. times the GFW of the resulting compound = (3.482352941)(30) = 104.4705882 is the Theorectical

4. Actual/ Theorectical = percentage

5. x / 104.4705882 = 88.5/100

6. x = (104.4705882)(.885)

92.45647059 is the actual yield or 92.5 grams

8. Answer = .5 grams

1. grams/GFW or 0.817g/82GFW = .0099634146

2. times the ratio 4:3 or 1:3/4 = 3/4(.0099634146) = .007472561

3. times the GFW of the resulting compound = (.007472561)(3+31+4(16)) = .7323109756 is the theorectical

4. Actual/ Theorectical = percentage

5. x / .7323109756 = 66.4/100

6. x = (.7323109756)(.664)

.4862544878 is the actual yield or .5

9. Answer = 79.4%

a. Actual = 55.5 grams

1. grams/GFW or 30.5g/32GFW = .953125

2. times the ratio 3:2 or 1:2/3 = 2/3(.953125)

3. times the GFW of the resulting compound = (.9531225)(62+48) = 69.89583333 is the theorectical

4. Actual/ theorectical = percentage

5. 55.5g/69.89583333g = .7940387481

6. .7940387481 x 100 = 79.40387481

79.4% is the percentage yield

10. Answer = 113.6 grams

1. grams/GFW or 57.1g/32 = 1.784375

2. times the ratio 1:2 = 2(1.784375) = 3.56875

3. times the GFW of the resulting compound = (3.56875)(70.9) = 253.024375 is the theorectical

4. Actual/ Theorectical = percentage

5. x / 253.024375 = 44.9/100

6. x = (253.024375)(.449) = 113.6079444

113.6 grams is the actual yield

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a. actual yield = 33g

Predicted yield =

1. grams/ GFW or 22.8/(23+34.45) = .3900769889

2. times the ratio (.3900769889)(1) = .3900769889

3. Times the GFW of the resuting compound (.3900769889)(23+1+32+4(16)) = 46.80923867

4. Actual/theorectical = 33/46.80923867 = .7049890351

5. x 100 = (.7049890351)(100) = 70.49890351% or 70%

70% is the percentage yield

2. Answer = 1.4 grams

1. grams/GFW or 4.17g/32GFW = .1303125

2. times the ratio 3:2 or 1:2/3 = (2/3)(.1303125) = .086875

3. Times the GFW of the resulting compound = (.086875)(44) = 3.8225 is the theorectical yield

4. Actual/Theorectical = percantage

5. x/3.8225 = 36.5/100

6. x = (3.8225)(.365) = 1.3952125 or 1.4

1.4g is the actual yield

3. Answer = 3.4 grams

1. grams/GFW or 12.4g/32GFW = .3875

2. times the ratio 11:8 1:8/11 = (8/11)(.3875) = .2818181818

3. times the GFW of the resulting compound = (.2818181818)(18) = 5.072727273

4. Actual/theorectical = percentage

5. x/5.072727273 = 66.6/100

6. x = (.666)(5.072727273) = 3.378436364 or 3.4

3.4g is the actual yield

4. Answer = 31.6%

a. Actual = .428 grams

1. grams/GFW or 3.61g/32GFW = .1128125

2. times the ratio 9:6 or 1:6/9 = (6/9)(.1128125) = .0752083333

3. times the GFW of the resulting compoudn = (.0752083333)(18)

4. Actual/theorectical = percentage

5. .428/1.35375 = percentage

6. .3161588181 x 100 = percentage

31.6% is the percentage yield

5. Answer = 82.9%

a. Actual = 84.9 grams

1. grams/GFW or 72.5 g/34 GFW = 2.132352941

2. times the ratio 2:3 or 1:3/2 = (3/2)(2.132352941) = 3.198528412

3. times the GFW of the resulting compound = (3.198528412)(32) = 102.3529412 grams

4. Actual/Theorectical = percentage

5. 84.9 grams/102.3529412 grams = percentage

6. percentage = .8294827586 x 100

82.9% is the percentage yield

6. Answer = 40.9%

a. Actual = 7.18 grams

1. grams/GFW or 55.7g/(6(12)+5(1)+35.45)GFW = .4953312583

2. times the ratio 4:2 or 1:1/2 = 1/2(.4953312583) = .2476656292

3. times the GFW of the resulting compound = (.2476656292)(70.9) = 17.55949311 grams

4. Actual/ Theorectical = percentage

5. 7.18 g/17.55949311 g = percentage

6. .4088956301 x 100 =percentage

40.9% is the percentage yield

7. Answer = 92.5 grams

1. grams/GFW or 59.2g/17GFW = 3.482352941

2. times the ratio 4:4 or 1:1 = 1(3.482352941) = 3.482352941

3. times the GFW of the resulting compound = (3.482352941)(30) = 104.4705882 is the Theorectical

4. Actual/ Theorectical = percentage

5. x / 104.4705882 = 88.5/100

6. x = (104.4705882)(.885)

92.45647059 is the actual yield or 92.5 grams

8. Answer = .5 grams

1. grams/GFW or 0.817g/82GFW = .0099634146

2. times the ratio 4:3 or 1:3/4 = 3/4(.0099634146) = .007472561

3. times the GFW of the resulting compound = (.007472561)(3+31+4(16)) = .7323109756 is the theorectical

4. Actual/ Theorectical = percentage

5. x / .7323109756 = 66.4/100

6. x = (.7323109756)(.664)

.4862544878 is the actual yield or .5

9. Answer = 79.4%

a. Actual = 55.5 grams

1. grams/GFW or 30.5g/32GFW = .953125

2. times the ratio 3:2 or 1:2/3 = 2/3(.953125)

3. times the GFW of the resulting compound = (.9531225)(62+48) = 69.89583333 is the theorectical

4. Actual/ theorectical = percentage

5. 55.5g/69.89583333g = .7940387481

6. .7940387481 x 100 = 79.40387481

79.4% is the percentage yield

10. Answer = 113.6 grams

1. grams/GFW or 57.1g/32 = 1.784375

2. times the ratio 1:2 = 2(1.784375) = 3.56875

3. times the GFW of the resulting compound = (3.56875)(70.9) = 253.024375 is the theorectical

4. Actual/ Theorectical = percentage

5. x / 253.024375 = 44.9/100

6. x = (253.024375)(.449) = 113.6079444

113.6 grams is the actual yield

Once you have finished, click the picture below to go to The End