Aleksza
Chemistry
2013-14
Ted-Ed-Acids & Bases
(http://ed.ted.com/lessons/the-strengths-and-weaknesses-of-acids-and-bases-george-zaidanand-charles-morton)
Name:___________________________________________________MOD:_______(32pts)
Multiple Choice: Select the best single answer and write it on the line provided. (2 pts each)
____1. What’s the difference between a proton and a positively charged hydrogen ion?
A Protons are neutral and hydrogen ions have a positive charge
B Hydrogen ions have one electron and protons don’t have any
C Protons weigh more than hydrogen ions
D They’re the same thing
____2. Which of the following statements is true:
A Our stomachs are about as acidic as our blood is basic
B Our stomachs are about as basic as our blood is acidic
C Our stomachs are far more acidic than our blood is basic
D Our stomachs are far more basic than our blood is acidic
____3. Which acid is stronger, hydrochloric or acetic?
A Hydrochloric
B Acetic
C They’re the same strength
D Nobody knows
____4. A proton deposit customer (an acid) is most similar to ________.
A A proton withdrawal customer
B An electron withdrawal customer
C An electron deposit customer
D None of the above
_____5. If you were to mix a strong acid with a weak base, would they completely
neutralize each other?
A Yes, always
B No, because a weak base cannot neutralize a strong acid
C No, because only acids can neutralize acids
D There’s no way to tell from the information given
Open Ended Questions: Respond appropriately regarding the questions asked. Use the
space provided or you may attach additional paper. Point values differ between questions.
Two important characteristics of acids and bases are: (1) strength and (2)
concentration. The video discussed strength, but not concentration.
6. What is the difference between a strong acid and a weak acid? (3 pts)
7. Vinegar is about 5% acetic acid. Is this a measure of its strength or concentration?
(3 pts)
8. If you were given the choice between drinking a solution of 0.1% hydrochloric acid (a
strong acid) to 70% acetic acid (a weak acid), which would you choose and why? Is
there any additional information you’d need to answer this question? (Note: DON’T
DRINK THINGS THAT AREN’T MEANT TO BE DRUNK. THIS IS PURELY A THOUGHT
EXPERIMENT.) (5 pts)
9. Suppose you mix hydrochloric acid (a strong acid) with ammonia (a weak base).
Would the final mixture be acidic, basic, or neutral? As you might have guessed, there’s
not enough information given to answer the question. What other information would
you need? (5 pts)
10. Why is donating a proton not very different from accepting an electron? At about
1:20 (time into video), the picture for hydrochloric acid was shown. Draw equivalent
pictures for acetic acid and ammonia. (almost like Lewis dot structures.) In each case,
show the donated (or accepted) proton (or electron). (6pts)