18H1 - Name: _ Date: _ 1. Which one of the following salts...

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Name: __________________________ Date: _____________ 1. Which one of the following salts will form a neutral solution on dissolving in water? A) NaCl B) KNO 2 C) NaCN D) NH 4 NO 3 E) FeCl 3 2. For H 3 PO 4 , K a1 = 7.3 × 10 - 3 , K a2 = 6.2 × 10 - 6 , and K a3 = 4.8 × 10 - 13 . An aqueous solution of NaH 2 PO 4 therefore would be A) neutral B) basic C) acidic 3. For H 3 PO 4 , K a1 = 7.3 × 10 - 3 , K a2 = 6.2 × 10 - 6 , and K a3 = 4.8 × 10 - 13 . An aqueous solution of Na 3 PO 4 therefore would be A) neutral B) basic C) acidic 4. Which one of the following salts will form a basic solution on dissolving in water? A) NaCl B) KCN C) NaNO 3 D) NH 4 NO 3 E) FeCl 3 5. In 0.10 M KCN, the chemical species with the highest concentration (except H 2 O) is A) Na + B) CN - C) H 3 O + (or H + ) D) OH - E) K + 6. What is the pH of a 0.20 M solution of NH 4 Cl? [K b (NH 3 ) = 1.8 × 10 - 5 ] A) 3.74 B) 4.98 C) 6.53 D) 9.02 Page 1
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E) 10.25 7. Calculate the pH of a 0.021 M NaCN solution. [K a (HCN) = 4.9 × 10 - 10 ] A) 1.68 B) 3.18 C) 5.49 D) 7.00 E) 10.82 8. Consider the weak bases below and their K b values: C 6 H 7 O K b = 1.3 × 10 - 10 C 2 H 5 NH 2 K b = 5.6 × 10 - 4 C 5 H 5
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18H1 - Name: _ Date: _ 1. Which one of the following salts...

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