Question: 1) A certain solution is tested with red and blue litmus paper. The red litmus paper stays red on contact with the solution. The blue

1) A certain solution is tested with red and blue litmus paper.

The red litmus paper stays red on contact with the solution. The blue litmus paper stays blue on contact with the solution.

What should we predict about the solution, based on the results?

Group of answer choices

The solution is neutral.

The solution is acidic.

The solution is basic.

2) Using Table 2 and image 2 from the lab document, estimate the pH of a solution which is orange in the presence of the indicator Methyl Orange.

3) A student was following the laboratory procedure to test the pH of an unknown solution. She observed the following experimental results when tested with the pH indicators shown.

Indicate the appropriate conclusion which should be drawn from each test, and then predict the pH of the solution.

4) A student was following the laboratory procedure to test the pH of an unknown solution. He observed the following experimental results when tested with the pH indicators shown.

Indicate the appropriate conclusion which should be drawn from each test, and then predict the pH of the solution.

pH Indicator	Observation	Conclusion
Methyl Orange	Yellow	[ Select ] ["pH is less than 3.1", "pH is between 3.1 and 4.4", "pH is greater than 4.4"]
Thymol Blue	Blue	[ Select ] ["pH is less than 1.2", "pH is between 1.2 and 2.8", "pH is between 2.8 and 8.2", "pH is between 8.2 and 9.1", "pH is greater than 9.1"]
Phenol Red	Red	[ Select ] ["pH is less than 6.6", "pH is between 6.6 and 8.0", "pH is greater than 8.0"]
Phenolphthalein	Red	[ Select ] ["pH is less than 8.0", "pH is between 8.0 and 9.8", "pH is greater than 9.8"]
Thymolphthalein	Blue	[ Select ] ["pH is less than 9.3", "pH is between 9.3 and 10.5", "pH is greater than 10.5"]

Given the data available, the pH of the solution is approximately [ Select ] ["1.0 or less", "2.5", "4.0", "5.0", "6.0", "7.0", "8.0", "9.0", "10.0 or greater"] .

5) A group of students was following the laboratory procedure to test the pH of an unknown solution. They observed the following experimental results when tested with the pH indicators shown.

Indicate the appropriate conclusion which should be drawn from each test, and then predict the pH of the solution.

pH Indicator	Observation	Conclusion
Methyl Orange	Yellow	[ Select ] ["pH is less than 3.1", "pH is between 3.1 and 4.4", "pH is greater than 4.4"]
Thymol Blue	Greenish Blue	[ Select ] ["pH is less than 1.2", "pH is between 1.2 and 2.8", "pH is between 2.8 and 8.2", "pH is between 8.2 and 9.1", "pH is greater than 9.1"]
Phenol Red	Red	[ Select ] ["pH is less than 6.6", "pH is between 6.6 and 8.0", "pH is greater than 8.0"]
Phenolphthalein	Pink	[ Select ] ["pH is less than 8.0", "pH is between 8.0 and 9.8", "pH is greater than 9.8"]
Thymolphthalein	Colorless	[ Select ] ["pH is less than 9.3", "pH is between 9.3 and 10.5", "pH is greater than 10.5"]

Given the data available, the pH of the solution is approximately [ Select ] ["1.0 or less", "2.5", "3.0", "4.0", "5.0", "6.0", "7.0", "8.0", "9.0", "10.5 or greater"] .

6) ? are substances that cause an increase in H⁺ ion concentration when dissolved in water. ? are substances that cause an reduce H⁺ ion concentration when dissolved in water.

7) Match the following solution pH values with their correct definition.

Group of answer choices

pH = 1.6