Focus on Analytical Questions- not memorization!

-Questions from the class notes page. (Answers)- First Period

1. (Matt W.) What does finding the pH of something mean?

2. (Matt L.) True or false? Is the pH scale a log scale? EXPLAIN.

3. (Ms. Todd) Explain what happens when an acid and base are added together. What are the resultant products?

4. (Emily S.) What is the difference between an acid and a base?

5. (Shelley) What are bases commonly associated with? Why?

6. (Chase) What are some of the properties of an acid?

7. (Marisa) How does the hydronium concentration in an acid affect how acidic or basic the substance is?

8. (Keenan) What is the type of scale for pH? (Choose multiple answers if necessary)
-Base 10

9. (Tara) What do bases accept to create water?
10. (Abby) What is the formula that shows what happens when acids release positive hydrogen ions into water?
11. (Adam) What does it mean for an acid or base to be corrosive? Give an example.
12.(Benjamin) Of all of the things I eat and use to cook with, are most of them basic, acidic, or neutral? Which has the least amount of foods? Why could this be?

-Questions from the pH Probe page. (Answers)- Second Period

1. (Wes) What is pH? Explain.
2. (Emily) What is the neutral pH level?
a) 6
b) 14
c) 7
d) 0

3. (Brianna) What does the probe use to measure the pH level of a substance?
a) A plastic tube
b) A long metal string
c) A small glass globe

4. (Jake) True or False. Pure water has a pH greater than sea water.

5) (Emma)Which of these is a common acid?
a) cleaner
b) soap
c) Aspirin

6. (Kristen) Is soapy water more basic than bleaches? Explain.

7. (Ryan Ch.) How does the pH probe collect the data?

-Questions from the litmus paper page. (Answers)- Third Period

1. (Hannah) Through what action does the acid or base travel on the litmus paper?
2. (Kelsey) What makes litmus paper different than regular printer paper?
3. (Lauren M.) Litmus dye is...
A. A type of fungus
B. A type of lichen
C. Roccella tinctoria
D. All of the above
4. (Ben) What dye is used for litmus paper? What can the dye be used for?
5. (Arjun) What color does the litmus paper change when dipped into a neutral substance?
6.) What color would an acid like vinegar turn on blue litmus paper? (Amanda R.)
A.) Green
B.) Blue
C.) Red
D.) Orange
E.) Purple
7. What is Litmus paper made out of? (Lauren P.)
a) Blue dye
b) Red dye
c) Lichens
d) Paper
e) All of the above
8. If the red litmus paper stays red, which of the following can’t the liquid be?
a) Hydrochloric acid
b) Potassium hydroxide
c) Distilled water

9. What color will red litmus paper turn once it reacts with a base? (Kunal)
10. Why does the red litmus paper not turn color with acids and the blue not turn color with bases? (Alex)
If you squeezed the juice out of a couple blueberries and put the pieces of litmus paper in it, what color would the litmus paper change to?

12. pH stands for what? (Tyler P.)
13. Is the litmus paper bleached? Does that make it reversable?

-Questions from the natural indicator page. (Answers)- Fourth Period

1.) When cabbage juice was added to the household substance and it turned purple, this is most likely an acid or base? (Caitlin)
2.) How can the cabbage juice be used as a way to test pH? Explain. (Tyler H)
3.) If the household substance turned a blue or green when cabbage juice was added to it, what does this mean? (Jacky)
a) The substance it is acid.
b) The substance is a base.
c) The substance is a neutral.
4.) Assuming that acidic substances turn more reddish when you add cabbage juice to them, what color would hydrochloric acid turn? Explain.(Christine)
5.) Beets, cherries, curry powder, purple peonies, red radish, rhubarb, rose petals, and strawberries are all examples of plants that are used to test pH. They all have one common factor. What is it, and what does it tell us? (Jacob W.)
6.)(Tyler S.)If a substance is tested with cabbage juice, and the result of this was a blue color, what would this tell us? Explain.
7.) When the cabbage juice turned a pink, red or orange color what does this mean the substance is? (Haleigh)
8.) What color will the natural indicator turn if something is a base? Neutral? (Sydney B.)
(Nick) 9.What solutions turned purple after the cabbage juice was added?
A) acidic solutions
B) neutral solutions
C) basic solutions

(Harrison) Would a solution be acidic or basic if litmus paper turns red when put in the solution? Explain!

Organic Chemistry Challenge:
Weak acids have
a) weak conjugate bases
b) strong conjugate bases
c) large Ka Values
d) small pKa values

11) When cabbage juice was added to a certain household substance and turned hot pink, is this most likely to indicate that this was acidic, basic, or nautral? Explain. (Olivia)

12) What should you do if you are making a cabbage juice indicator and the solution turns pink? (Cameron)
a) Immediately alert a teacher
b) Throw away the batch
c) Run away
d) None of the above

13) If a substance tested with cabbage juice turns hot pink, is it:__?
a) one of the most acidic
b) one of the most basic
c) neutral
d) barely acidic
e) barely a base