AP Chemistry TSNF Q11

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11 Terms

1
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Buffers are created by a…

weak acid + Conjugate Base (salt)
weak base + Conjugate Acid (salt)

2
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[H+]=

MaKa/[salt]… You can use # of moles instead of molarity

3
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Adding a common ion to a weak acid (or base)

decreases the % ionization, so pH gets closer to 7

4
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MaVa=MbVb is only true…

at equivalence poimt

5
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M1V1=M2V2 is

not on formula sheet, but is useful for dilation calculations

6
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pH=…

pKa at ½ equivalence point. Also [HA] = [A-]

7
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More buffer capacity means…

more moles of weak acid & conjugate base or weak base & conjugate acid

8
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2 ions, 3 ions

x², 4x³, x = molar solubility in moles/liter

9
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larger the x value,

more soluble the salt is

10
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if Q>Ksp

precipitate is formed

11
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Group 1 cations (NH4+, NO3-)

are always soluble in water. usually spectator ions in a chemical reaction