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c02a02 pH Scale and Acids and Bases
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1. Using the abbreviated pH scale, check the box of the pH value that most closely approximates the listed substance.
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5 points
1
3
5
7
9
11
13
strongest base
stomach acid
strongest acid
pure water
most biological solutions, including blood
1
3
5
7
9
11
13
strongest base
stomach acid
strongest acid
pure water
most biological solutions, including blood
2. A proton donor
*
1 point
buffer
base
acid
3. A proton acceptor
*
1 point
buffer
base
acid
4. Resists pH change
*
1 point
base
buffer
acid
5. Bicarbonate (HCO3-)
*
1 point
strong acid
strong base
buffer
weak base
weak acid
6. Carbonic acid (H2CO3)
*
1 point
strong base
strong acid
weak acid
weak base
buffer
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