Chemistry answers HDML lab 1 PDF

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the answers for the HDML simulation...

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1.

In Experiment 1, in which test tube(s) did the addition of bromothymol blue result in an orange color?

Select one:

test tubes 6 and 7 b. test tubes 4 and 5 c. test tubes 1 – 5 d. test tubes 3 – 5 2. In Experiment 1, in which test tube(s) did the addition of bromothymol blue result in a green color? a.

Select one:

test tubes 5 – 7 b. test tubes 1 – 2 c. test tubes 6 and 7 d. test tube 3 a.

3.

In Experiment 1, in which test tubes did the addition of methyl yellow result in a red color?

Select one:

test tube 1 only b. test tubes 5 and 6 c. test tubes 3 and 4 a.

d.

test tubes 1 and 2 4. In Experiment 1, in which test tubes did the addition of bromocresol green result in a yellow color?

Select one:

test tubes 1 and 2 b. test tubes 6 and 7 c. test tubes 4 and 5 a.

d.

test tubes 5 and 6 5. In Experiment 1, what was the color of the solution when bromocresol green was added to test tube 4?

Select one:

red b. blue c. green a.

d.

yellow 6. In Experiment 1, what was the color of the solution when methyl yellow was added to test tube 3?

Select one:

orange b. red c. yellow a.

d.

blue 7. The pH of the test tube can be calculated by knowing the concentration of hydronium ions in solution. Given that HCl is a strong acid, the concentration of the hydronium ions is equal to the concentration of the HCl solution. What is the pH of test tube 1? Choose the closest answer.

Select one:

4.2 b. 1.3 c. 1.0 a.

d.

2.8 8.

Given the data you collected in Experiment 1, between which pH values does bromothymol blue change from yellow to green?

Select one:

1.3 to 2.3 b. 6.3 to 7.3 c. 5.3 to 6.3 d. 4.3 to 5.3 a.

9.

Given the data you collected in Experiment 1, between which pH values does methyl yellow change from red to orange?

Select one:

6.3 to 7.3 b. 2.3 to 3.3 c. 1.3 to 2.3 a.

d.

4.3 to 5.3 10. In Experiment 2, in which test tube(s) did the addition of bromothymol blue result in a dark blue color?

Select one:

test tubes 2 – 5 b. test tubes 1 – 6 c. test tubes 4 – 7 a.

d.

test tubes 4 and 5 11. In Experiment 2, what was the color of the solution when alizarin yellow was added to test tube 3?

Select one:

orange b. red c. blue d. yellow 12. In Experiment 2, in which test tube(s) did the addition of alizarin yellow result in a yellow color? a.

Select one:

test tubes 1 – 3 b. test tubes 4 – 7 c. test tubes 2 and 3 a.

d.

test tubes 3 and 4 13. In Experiment 2, in which test tube(s) did the addition of phenolphthalein result in a pink color?

Select one:

test tubes 1 – 5 b. test tubes 4 – 7 c. test tube 6 a.

d.

test tube 7 14. In Experiment 2, in which test tube(s) did the addition of phenolphthalein result in a colorless solution?

Select one:

test tubes 4 and 5 b. test tubes 1 – 3 c. test tubes 6 and 7 a.

d.

test tubes 2 and 3 15. The pH in the test tube can be calculated by knowing the concentration of hydroxide ions in solution. The pH = 14 + log[OH-]. For example, the 0.100 M stock of NaOH has a pH = 14 + log(0.100) = 13. What is the pH in test tube 1? Choose the closest answer.

Select one:

1.0 b. 12.7 c. 6.8 a.

d.

7.9 16.

The pH in the test tube can be calculated by knowing the concentration of hydroxide ions in solution. The pH = 14 + log[OH-]. For example, the 0.100 M stock of NaOH has a pH = 14 + log(0.100) = 13. Based on the dilution used, what is the pH in test tube 4? Choose the closest answer.

Select one:

9.7 b. 4.3 c. 6.8 d. 12.8 a.

17.

Between which pH values does phenolphthalein change from colorless to pink?

Select one:

6.7 to 7.7 b. 7.7 to 8.7 c. 9.7 to 10.7 a.

d.

14.3 to 15.3 18. Suppose you wanted to monitor a pH change between 5.3 and 6.3. Which indicator would be most appropriate?

Select one:

methyl yellow b. phenolphthalein c. bromothymol blue a.

d.

alizarin yellow 19. Suppose you wanted to monitor a pH change between 8.7 and 7.7. Which indicator would be most appropriate?

Select one:

phenolphthalein b. bromocresol green c. bromothymol blue a.

d.

methyl yellow 20. Suppose a student used one of the indicators you used to test the pH of an ammonia solution. Given the figure below 11.4, what indicator do you think he used?

Select one:

methyl yellow b. alizarin yellow c. bromothymol blue a.

d.

phenolphthalein

12.7 11.7 10.7 9.7 8.7 7.72 7.11...