1. The pH electrode uses a glass bulb to provide protonation sites for the solut
ID: 1019991 • Letter: 1
Question
1. The pH electrode uses a glass bulb to provide protonation sites for the solution.
a. True
b. False
2. How does one write the Ksp expression?
3. Leonardo da Vinci significantly contributed to the study of redox reactions.
a. True
b. False
4. Using the phrase OIL RIG, what are the definitions of reduction and oxidation?
http://ed.ted.com/lessons/why-batteries-die-adam-jacobson
5. The 2 scientists in the Ted Ed video about batteries are Volta and Galvani.
a. True
b. False
6. At the anode ____ occurs, and at the cathode ____ occurs.
a. products/reactants, all phases are included b. products/reactants, NO solids or liquids c. reactants/products, NO solids or liquidsExplanation / Answer
1. The pH electrode uses a glass bulb to provide protonation sites for the solution. ----------- True
Explanation: The pH sensing ability of the glass electrode stems from the ion exchange property of its glass membrane. Glass is mostly amorphous silicon dioxide, with embedded oxides of alkali metals. When the surface of glass is exposed to water, some Si–O- groups become protonated
Si-O- + H3O+ Si-O-H+ + H2O
2. How does one write the Ksp expression ---------- b. products/reactants, NO solids or liquids
3. Leonardo da Vinci significantly contributed to the study of redox reactions. ------------ False
4. Using the phrase OIL RIG, what are the definitions of reduction and oxidation
answer: a. Reduction is gain of electrons; Oxidation is loss of electrons
5. The 2 scientists in the Ted Ed video about batteries are Volta and Galvani. --------- True
6. At the anode ____ occurs, and at the cathode ____ occurs.
Answer: b. Reduction at cathode; oxidation at anode
oxidation means loss of electrons and reduction means gain of electrons.
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